diff --git a/composer.json b/composer.json
index 7c1ddcf93cd892ae047fde886070f6ca3bbefae8..73d1b92bdaa58f9021d8e68d6f534f33c0507464 100644
--- a/composer.json
+++ b/composer.json
@@ -112,7 +112,7 @@
 		"phpstan/phpstan": "^0.12.99",
 		"phpunit/phpunit": "^9.5.10",
 		"typo3/cms-styleguide": "~11.5.0",
-		"typo3/testing-framework": "^6.14.0"
+		"typo3/testing-framework": "dev-master"
 	},
 	"suggest": {
 		"ext-gd": "GDlib/Freetype is required for building images with text (GIFBUILDER) and can also be used to scale images",
@@ -132,7 +132,7 @@
 			"always-add-alias-loader": true
 		},
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		}
 	},
 	"scripts": {
diff --git a/composer.lock b/composer.lock
index b94a8f019fdbfe7b79bc6bc39d5b375319d03343..0629ba1c8e21cd0d34570f275a40cace255f5504 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "03f028291848fc7ee526b81b8cf3c910",
+    "content-hash": "b9d2606e7021783aff0571c136dc0887",
     "packages": [
         {
             "name": "bacon/bacon-qr-code",
@@ -8210,16 +8210,16 @@
         },
         {
             "name": "typo3/testing-framework",
-            "version": "6.14.0",
+            "version": "dev-master",
             "source": {
                 "type": "git",
                 "url": "https://github.com/TYPO3/testing-framework.git",
-                "reference": "a7c449cb08cf8483f548b064ede7ac9c28e2a563"
+                "reference": "f2f7b23a7b070e07ab0ff5ad3358a8ab1ca7db7f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/TYPO3/testing-framework/zipball/a7c449cb08cf8483f548b064ede7ac9c28e2a563",
-                "reference": "a7c449cb08cf8483f548b064ede7ac9c28e2a563",
+                "url": "https://api.github.com/repos/TYPO3/testing-framework/zipball/f2f7b23a7b070e07ab0ff5ad3358a8ab1ca7db7f",
+                "reference": "f2f7b23a7b070e07ab0ff5ad3358a8ab1ca7db7f",
                 "shasum": ""
             },
             "require": {
@@ -8228,18 +8228,19 @@
                 "php": ">= 7.2",
                 "phpunit/phpunit": "^8.4 || ^9.0",
                 "psr/container": "^1.0",
-                "typo3/cms-backend": "10.*.*@dev || 11.*.*@dev",
-                "typo3/cms-core": "10.*.*@dev || 11.*.*@dev",
-                "typo3/cms-extbase": "10.*.*@dev || 11.*.*@dev",
-                "typo3/cms-fluid": "10.*.*@dev || 11.*.*@dev",
-                "typo3/cms-frontend": "10.*.*@dev || 11.*.*@dev",
-                "typo3/cms-install": "10.*.*@dev || 11.*.*@dev",
-                "typo3/cms-recordlist": "10.*.*@dev || 11.*.*@dev",
+                "typo3/cms-backend": "12.*.*@dev",
+                "typo3/cms-core": "12.*.*@dev",
+                "typo3/cms-extbase": "12.*.*@dev",
+                "typo3/cms-fluid": "12.*.*@dev",
+                "typo3/cms-frontend": "12.*.*@dev",
+                "typo3/cms-install": "12.*.*@dev",
+                "typo3/cms-recordlist": "12.*.*@dev",
                 "typo3fluid/fluid": "^2.5|^3"
             },
             "conflict": {
                 "doctrine/dbal": "2.13.0 || 2.13.1"
             },
+            "default-branch": true,
             "type": "library",
             "autoload": {
                 "psr-4": {
@@ -8272,14 +8273,16 @@
             "support": {
                 "general": "https://typo3.org/support/",
                 "issues": "https://github.com/TYPO3/testing-framework/issues",
-                "source": "https://github.com/TYPO3/testing-framework/tree/6.14.0"
+                "source": "https://github.com/TYPO3/testing-framework/tree/master"
             },
-            "time": "2021-11-15T19:26:13+00:00"
+            "time": "2021-11-18T09:46:38+00:00"
         }
     ],
     "aliases": [],
     "minimum-stability": "stable",
-    "stability-flags": [],
+    "stability-flags": {
+        "typo3/testing-framework": 20
+    },
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
diff --git a/typo3/sysext/adminpanel/composer.json b/typo3/sysext/adminpanel/composer.json
index cdc8683b9b14cb02b4537a77008bd7b9f5040329..68982116e980ed370b1b7e218a58fbe9b6047421 100644
--- a/typo3/sysext/adminpanel/composer.json
+++ b/typo3/sysext/adminpanel/composer.json
@@ -23,10 +23,10 @@
 		"psr/http-server-handler": "^1.0",
 		"psr/http-server-middleware": "^1.0",
 		"symfony/var-dumper": "^5.3.7",
-		"typo3/cms-backend": "11.5.*@dev",
-		"typo3/cms-core": "11.5.*@dev",
-		"typo3/cms-fluid": "11.5.*@dev",
-		"typo3/cms-frontend": "11.5.*@dev",
+		"typo3/cms-backend": "12.0.*@dev",
+		"typo3/cms-core": "12.0.*@dev",
+		"typo3/cms-fluid": "12.0.*@dev",
+		"typo3/cms-frontend": "12.0.*@dev",
 		"typo3fluid/fluid": "^2.7.1"
 	},
 	"conflict": {
@@ -34,7 +34,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/adminpanel/ext_emconf.php b/typo3/sysext/adminpanel/ext_emconf.php
index 4b8a2ee93ac426f2d0fd950f52ac772229e9051d..93543750eea1d37a86ba1800b40150be030885b2 100644
--- a/typo3/sysext/adminpanel/ext_emconf.php
+++ b/typo3/sysext/adminpanel/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/backend/Tests/Functional/Configuration/SiteConfiguration/Fixtures/Extensions/conf_overriding/a/ext_emconf.php b/typo3/sysext/backend/Tests/Functional/Configuration/SiteConfiguration/Fixtures/Extensions/conf_overriding/a/ext_emconf.php
index 5128242d378d739323551cf1a2e1c430a39258ff..8a45b073c5aa266591fb1a4b07498df97bac417a 100644
--- a/typo3/sysext/backend/Tests/Functional/Configuration/SiteConfiguration/Fixtures/Extensions/conf_overriding/a/ext_emconf.php
+++ b/typo3/sysext/backend/Tests/Functional/Configuration/SiteConfiguration/Fixtures/Extensions/conf_overriding/a/ext_emconf.php
@@ -12,10 +12,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/backend/Tests/Functional/Configuration/SiteConfiguration/Fixtures/Extensions/conf_overriding/b/ext_emconf.php b/typo3/sysext/backend/Tests/Functional/Configuration/SiteConfiguration/Fixtures/Extensions/conf_overriding/b/ext_emconf.php
index 0be5b6c2cd657c78ab82f52d253828f30b3946ef..2ce6979dff599a3faa21be3833ffdb26625d1ebe 100644
--- a/typo3/sysext/backend/Tests/Functional/Configuration/SiteConfiguration/Fixtures/Extensions/conf_overriding/b/ext_emconf.php
+++ b/typo3/sysext/backend/Tests/Functional/Configuration/SiteConfiguration/Fixtures/Extensions/conf_overriding/b/ext_emconf.php
@@ -12,11 +12,11 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'a' => '11.5.4',
+            'typo3' => '12.0.0',
+            'a' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/backend/composer.json b/typo3/sysext/backend/composer.json
index 3a3060453243d9934fa98ae49128e3f186009da1..cabb8297d4f474406702508be58f06a33667ed98 100644
--- a/typo3/sysext/backend/composer.json
+++ b/typo3/sysext/backend/composer.json
@@ -20,8 +20,8 @@
 	},
 	"require": {
 		"psr/event-dispatcher": "^1.0",
-		"typo3/cms-core": "11.5.*@dev",
-		"typo3/cms-recordlist": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev",
+		"typo3/cms-recordlist": "12.0.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-install": "To generate url to install tool in environment toolbar"
@@ -39,7 +39,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/backend/ext_emconf.php b/typo3/sysext/backend/ext_emconf.php
index 6fac6171ed82a45b412dc8bec30d9391103ff33e..25e9178d6c8a935a6ad9cbbba21dac86fe75f09f 100644
--- a/typo3/sysext/backend/ext_emconf.php
+++ b/typo3/sysext/backend/ext_emconf.php
@@ -9,11 +9,11 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'recordlist' => '11.5.4',
+            'typo3' => '12.0.0',
+            'recordlist' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/belog/composer.json b/typo3/sysext/belog/composer.json
index 08c89258c771f36a125177f9e91883f25cb3296c..76716962884813dd8c100c9acd8edabc757d1b58 100644
--- a/typo3/sysext/belog/composer.json
+++ b/typo3/sysext/belog/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/belog/ext_emconf.php b/typo3/sysext/belog/ext_emconf.php
index 06ba21950ffb151fd71f97e0a81568f48eacd3d5..1d13f576f34f86b96d9473d51189e6a6240fb547 100644
--- a/typo3/sysext/belog/ext_emconf.php
+++ b/typo3/sysext/belog/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/beuser/composer.json b/typo3/sysext/beuser/composer.json
index 01f8b169ae307dc847cdcdbf90a22826b4765387..f928b334e77febd690b9752b201e884ccf40ddb6 100644
--- a/typo3/sysext/beuser/composer.json
+++ b/typo3/sysext/beuser/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/beuser/ext_emconf.php b/typo3/sysext/beuser/ext_emconf.php
index 4b44a3f5191e9a36de6ad60d6c1936418d038e68..55c29efbd5a8f45d9dca4ebac8e23fac4b0b1f33 100644
--- a/typo3/sysext/beuser/ext_emconf.php
+++ b/typo3/sysext/beuser/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Classes/Information/Typo3Version.php b/typo3/sysext/core/Classes/Information/Typo3Version.php
index 5b5ae236b1d7d555443c38692f77afbbb312c344..c850653ff8c0258865c879cd50d686023839d136 100644
--- a/typo3/sysext/core/Classes/Information/Typo3Version.php
+++ b/typo3/sysext/core/Classes/Information/Typo3Version.php
@@ -19,8 +19,8 @@ namespace TYPO3\CMS\Core\Information;
 
 class Typo3Version
 {
-    protected const VERSION = '11.5.4-dev';
-    protected const BRANCH = '11.5';
+    protected const VERSION = '12.0.0-dev';
+    protected const BRANCH = '12.0';
 
     /**
      * Define constants used up until TYPO3 v10, this constructor can be removed in TYPO3 v12.
diff --git a/typo3/sysext/core/Documentation/Changelog/master/Index.rst b/typo3/sysext/core/Documentation/Changelog/master/Index.rst
new file mode 100644
index 0000000000000000000000000000000000000000..0f979dde6a58ddf232171eb6b94009460b0e990d
--- /dev/null
+++ b/typo3/sysext/core/Documentation/Changelog/master/Index.rst
@@ -0,0 +1,51 @@
+.. include:: ../../Includes.txt
+
+master Changes
+==============
+
+**Table of contents**
+
+.. contents::
+   :local:
+   :depth: 1
+
+
+Breaking Changes
+^^^^^^^^^^^^^^^^
+
+.. toctree::
+   :maxdepth: 1
+   :titlesonly:
+   :glob:
+
+   Breaking-*
+
+Features
+^^^^^^^^
+
+.. toctree::
+   :maxdepth: 1
+   :titlesonly:
+   :glob:
+
+   Feature-*
+
+Deprecation
+^^^^^^^^^^^
+
+.. toctree::
+   :maxdepth: 1
+   :titlesonly:
+   :glob:
+
+   Deprecation-*
+
+Important
+^^^^^^^^^
+
+.. toctree::
+   :maxdepth: 1
+   :titlesonly:
+   :glob:
+
+   Important-*
diff --git a/typo3/sysext/core/Documentation/Index.rst b/typo3/sysext/core/Documentation/Index.rst
index 54164a18595c0c7775e465f234f17de6639beaaa..9976e75f7a370ac4b90ec866418e7cc7fdd556e9 100644
--- a/typo3/sysext/core/Documentation/Index.rst
+++ b/typo3/sysext/core/Documentation/Index.rst
@@ -13,6 +13,7 @@ Every change to the TYPO3 Core which might affect your site is documented here.
    :titlesonly:
 
    Sitemap/Index
+   Master
    Changelog-11
    Changelog-10
    Changelog-9
diff --git a/typo3/sysext/core/Tests/Functional/Cache/Core/Fixtures/Extensions/aliases_test/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Cache/Core/Fixtures/Extensions/aliases_test/ext_emconf.php
index 5128242d378d739323551cf1a2e1c430a39258ff..8a45b073c5aa266591fb1a4b07498df97bac417a 100644
--- a/typo3/sysext/core/Tests/Functional/Cache/Core/Fixtures/Extensions/aliases_test/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Cache/Core/Fixtures/Extensions/aliases_test/ext_emconf.php
@@ -12,10 +12,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Category/Collection/Fixtures/Extensions/test/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Category/Collection/Fixtures/Extensions/test/ext_emconf.php
index d0dd12affdc63bd19bae197784ef8c0c63934a2f..ea3b2650e7f25ea799280fa64be1a722d7599d8c 100644
--- a/typo3/sysext/core/Tests/Functional/Category/Collection/Fixtures/Extensions/test/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Category/Collection/Fixtures/Extensions/test/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'test extension',
     'description' => '',
     'category' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Christian Kuhn',
@@ -14,7 +14,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Database/Fixtures/Extensions/test_expressionbuilder/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Database/Fixtures/Extensions/test_expressionbuilder/ext_emconf.php
index c54e8f3697c56a560c2c048a78ac9053b1a1376e..f8110041bb785ac280a97da241694439d2f15da0 100644
--- a/typo3/sysext/core/Tests/Functional/Database/Fixtures/Extensions/test_expressionbuilder/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Database/Fixtures/Extensions/test_expressionbuilder/ext_emconf.php
@@ -6,14 +6,14 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'ExpressionBuilder Test',
     'description' => 'ExpressionBuilder Test',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Christian Kuhn',
     'author_email' => 'lolli@schwarzbu.ch',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/irre_tutorial/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/irre_tutorial/ext_emconf.php
index 2009d5836c91cee7eef43da0f117009029178662..d520effee6dc3a154b37466c545307df31bc264b 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/irre_tutorial/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/irre_tutorial/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Fixture extension for functional tests for Inline Relational Record Editing IRRE',
     'description' => 'based on irre_tutorial extension created by Oliver Hader, see https://forge.typo3.org/projects/extension-irre_tutorial',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Oliver Hader',
@@ -14,8 +14,8 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'workspaces' => '11.5.4',
+            'typo3' => '12.0.0',
+            'workspaces' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler/ext_emconf.php
index de0b1bf981742157bfbb261a91b202b7e5955cda..edb9f5e8a39dc6e707448e9cd7e09d39dff90f1b 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'DataHandler Test',
     'description' => 'DataHandler Test',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Oliver Hader',
@@ -14,8 +14,8 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'workspaces' => '11.5.4',
+            'typo3' => '12.0.0',
+            'workspaces' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_eid/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_eid/ext_emconf.php
index 6d480dfb45427f4b0bafa52386394c3caf4571e5..dfe86b69ed58e4299c31a2ecd7a4be99151e4a47 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_eid/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_eid/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Frontend eid responder',
     'description' => 'Frontend eid responder',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Stefan Bürk',
@@ -14,7 +14,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_fluid_email/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_fluid_email/ext_emconf.php
index 4ff2f81a6c9d9854a789417c88471eb8f287b1b2..1ff9623cca8f4eae7fad2eeb907c56e0ead2a92b 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_fluid_email/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_fluid_email/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Testing FluidEmail',
     'description' => 'Testing FluidEmail',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Oliver Bartsch',
@@ -14,7 +14,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_csv/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_csv/ext_emconf.php
index 97a535e87a5996e709498f58f534ae38b74f9928..a16ab096e73092f9861c743512970a379ec98bbe 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_csv/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_csv/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'DataHandler Testing test_irre_csv',
     'description' => 'DataHandler Testing test_irre_csv',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Anja Leichsenring',
@@ -14,8 +14,8 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'workspaces' => '11.5.4',
+            'typo3' => '12.0.0',
+            'workspaces' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_localization/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_localization/ext_emconf.php
index a983c23a6864e05e3c8a31ecd263e2be2d7a1e04..1acbd93401969011ebe1f3bd595bdbec6530ef45 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_localization/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_localization/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Localization Testing',
     'description' => 'Localization Testing',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Simon Gilli',
@@ -14,7 +14,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_meta/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_meta/ext_emconf.php
index eb5c769d24c9c619611db78c8a9a7c86eeff74c4..985a5c69fa7e374306a59781221785aff1ffbb71 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_meta/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_meta/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'MetaData Test',
     'description' => 'MetaData Test',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Frank Nägler',
@@ -14,8 +14,8 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'seo' => '11.5.4',
+            'typo3' => '12.0.0',
+            'seo' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_resources/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_resources/ext_emconf.php
index 9851f0e5d730e379e982d19f5721858e3a29de08..8edba7732e09cf98a300205a94bd64423b9ddbb5 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_resources/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_resources/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Test Resources',
     'description' => 'Test Resources',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Oliver Hader',
@@ -14,7 +14,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_select_flex_mm/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_select_flex_mm/ext_emconf.php
index d3328e89291c55dc26a4efd2f3339041123eac29..0ea8263a18691ccd68026fbc800d52805f051494 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_select_flex_mm/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_select_flex_mm/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'DataHandler Testing test_select_flex_mm',
     'description' => 'DataHandler Testing test_select_flex_mm',
     'category' => 'example',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Christian Kuhn',
@@ -14,8 +14,8 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'workspaces' => '11.5.4',
+            'typo3' => '12.0.0',
+            'workspaces' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Tests/Unit/Utility/Fixtures/ext_emconf.php b/typo3/sysext/core/Tests/Unit/Utility/Fixtures/ext_emconf.php
index 2760cab4f30d15ffdd99ab169e2f012c519a5e94..016cdd35a0749dbde49628642ebb1cbe5b926e8f 100644
--- a/typo3/sysext/core/Tests/Unit/Utility/Fixtures/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Unit/Utility/Fixtures/ext_emconf.php
@@ -11,7 +11,7 @@ $EM_CONF[$_EXTKEY] = [
     'author' => '',
     'author_email' => '',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [],
         'conflicts' => [],
diff --git a/typo3/sysext/core/composer.json b/typo3/sysext/core/composer.json
index 9f803ca23e6d37adecf104490c243f6949720efd..46a976faa6c000f7d11d2a4054850461626f6a1f 100644
--- a/typo3/sysext/core/composer.json
+++ b/typo3/sysext/core/composer.json
@@ -102,7 +102,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/core/ext_emconf.php b/typo3/sysext/core/ext_emconf.php
index 27ca0e43ab5d77d3933ccb30158e153ddc10f73b..6381ab09f6e2cc9e40ef6bb4ef0fca072f9a09ee 100644
--- a/typo3/sysext/core/ext_emconf.php
+++ b/typo3/sysext/core/ext_emconf.php
@@ -9,7 +9,7 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [],
         'conflicts' => [],
diff --git a/typo3/sysext/dashboard/composer.json b/typo3/sysext/dashboard/composer.json
index 67c6c336934e25ca3a1d0aaedc0802f2f121d508..9027ce74be8539c186ef575c4b8718cd46370de5 100644
--- a/typo3/sysext/dashboard/composer.json
+++ b/typo3/sysext/dashboard/composer.json
@@ -19,18 +19,18 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev",
-		"typo3/cms-frontend": "11.5.*@dev",
-		"typo3/cms-backend": "11.5.*@dev",
-		"typo3/cms-fluid": "11.5.*@dev",
-		"typo3/cms-extbase": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev",
+		"typo3/cms-frontend": "12.0.*@dev",
+		"typo3/cms-backend": "12.0.*@dev",
+		"typo3/cms-fluid": "12.0.*@dev",
+		"typo3/cms-extbase": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "dashboard",
diff --git a/typo3/sysext/dashboard/ext_emconf.php b/typo3/sysext/dashboard/ext_emconf.php
index 5ce1ae6c2ffb336fa01a39f6fd197e063c8a15bc..55e72d6e270f94997d9eecf17f21e2dac29ecac6 100644
--- a/typo3/sysext/dashboard/ext_emconf.php
+++ b/typo3/sysext/dashboard/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/blog_example/ext_emconf.php b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/blog_example/ext_emconf.php
index f250753db7d91a9a64ca96e2f066ef29dd54ac4d..fceee03ef328400cd6e91fca79df8fff68aabbae 100644
--- a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/blog_example/ext_emconf.php
+++ b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/blog_example/ext_emconf.php
@@ -11,10 +11,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_email' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/class_overriding/a/ext_emconf.php b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/class_overriding/a/ext_emconf.php
index 5128242d378d739323551cf1a2e1c430a39258ff..8a45b073c5aa266591fb1a4b07498df97bac417a 100644
--- a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/class_overriding/a/ext_emconf.php
+++ b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/class_overriding/a/ext_emconf.php
@@ -12,10 +12,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/class_overriding/b/ext_emconf.php b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/class_overriding/b/ext_emconf.php
index 5128242d378d739323551cf1a2e1c430a39258ff..8a45b073c5aa266591fb1a4b07498df97bac417a 100644
--- a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/class_overriding/b/ext_emconf.php
+++ b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/class_overriding/b/ext_emconf.php
@@ -12,10 +12,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_argument_test/ext_emconf.php b/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_argument_test/ext_emconf.php
index 5128242d378d739323551cf1a2e1c430a39258ff..8a45b073c5aa266591fb1a4b07498df97bac417a 100644
--- a/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_argument_test/ext_emconf.php
+++ b/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_argument_test/ext_emconf.php
@@ -12,10 +12,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_test/ext_emconf.php b/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_test/ext_emconf.php
index 5128242d378d739323551cf1a2e1c430a39258ff..8a45b073c5aa266591fb1a4b07498df97bac417a 100644
--- a/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_test/ext_emconf.php
+++ b/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_test/ext_emconf.php
@@ -12,10 +12,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/extbase/composer.json b/typo3/sysext/extbase/composer.json
index 58fd29cff5cd964e58d5503afd9b3b1487e11bd5..4c181c2e511af38d867829e8a19fd141ee5600d0 100644
--- a/typo3/sysext/extbase/composer.json
+++ b/typo3/sysext/extbase/composer.json
@@ -24,7 +24,7 @@
 		"symfony/dependency-injection": "^5.3.7",
 		"symfony/property-access": "^5.3.7",
 		"symfony/property-info": "^5.3.7",
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Additional scheduler tasks"
@@ -34,7 +34,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/extbase/ext_emconf.php b/typo3/sysext/extbase/ext_emconf.php
index 8fc40b85b7325e0f199d7d7d1013a5ed0b684d31..774f918ea0aa8de195e6c031acd82074854bb198 100644
--- a/typo3/sysext/extbase/ext_emconf.php
+++ b/typo3/sysext/extbase/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/extensionmanager/composer.json b/typo3/sysext/extensionmanager/composer.json
index da05ca1c6deceed8e01aa4fc9259fed22f15428c..c4e77913d3341dc6b710b859d4170aa916bbdfd2 100644
--- a/typo3/sysext/extensionmanager/composer.json
+++ b/typo3/sysext/extensionmanager/composer.json
@@ -20,14 +20,14 @@
 	},
 	"require": {
 		"ext-libxml": "*",
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/extensionmanager/ext_emconf.php b/typo3/sysext/extensionmanager/ext_emconf.php
index 3e19c1b7563a32965463cdfaf9d152b713a66df1..393eedfa021c6113764c847a677015917a659927 100644
--- a/typo3/sysext/extensionmanager/ext_emconf.php
+++ b/typo3/sysext/extensionmanager/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/felogin/composer.json b/typo3/sysext/felogin/composer.json
index d861d05f5b32a3b17368a691953162a3a8093a39..6e14431dcea108105767341e5d2c1a3e65847836 100644
--- a/typo3/sysext/felogin/composer.json
+++ b/typo3/sysext/felogin/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/felogin/ext_emconf.php b/typo3/sysext/felogin/ext_emconf.php
index 1a5b4f55da014323670d438390f7743fdcf8d202..f6fc392203d3ecf1a8572595879ac79e379a62db 100644
--- a/typo3/sysext/felogin/ext_emconf.php
+++ b/typo3/sysext/felogin/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/filelist/composer.json b/typo3/sysext/filelist/composer.json
index e0086ec27def674d4c8f2c076a35d5d9908ba612..2fe893b250266184ce41c9870c546d4171167c01 100644
--- a/typo3/sysext/filelist/composer.json
+++ b/typo3/sysext/filelist/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/filelist/ext_emconf.php b/typo3/sysext/filelist/ext_emconf.php
index d340bd14a0c51413e3757dd82b65534e3edc5e70..1fd8434ebb797ae443935ebc985717d7acfa5cf2 100644
--- a/typo3/sysext/filelist/ext_emconf.php
+++ b/typo3/sysext/filelist/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/filemetadata/composer.json b/typo3/sysext/filemetadata/composer.json
index 152efebb53c6d52d4d29e4f196379358d369ec4d..cc0f7138ec0f44efe605072c3ccd9fac42e5b652 100644
--- a/typo3/sysext/filemetadata/composer.json
+++ b/typo3/sysext/filemetadata/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "filemetadata"
diff --git a/typo3/sysext/filemetadata/ext_emconf.php b/typo3/sysext/filemetadata/ext_emconf.php
index 41d027a3d3110f75149ad5d3bc17733e0c90b146..f2e5408836228b1778212d6de820615784235ddb 100644
--- a/typo3/sysext/filemetadata/ext_emconf.php
+++ b/typo3/sysext/filemetadata/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_email' => 'typo3cms@typo3.org',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/composer.json b/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/composer.json
index fed2cd497a2790e2e202ab5a3645f2ea89b5f82c..cc66330371b00e076bce79fb56d29db812075206 100644
--- a/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/composer.json
+++ b/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "11.5.x-dev"
+            "dev-master": "12.0.x-dev"
         },
         "typo3/cms": {
             "cms-package-dir": "{$vendor-dir}/typo3/cms",
diff --git a/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/ext_emconf.php b/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/ext_emconf.php
index 586e8a75ba04f445bde218cb0740e60e35abfea2..8eb6aa2f5fd42a56f73352bb01f1219f0ce50ec8 100644
--- a/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/ext_emconf.php
+++ b/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/ext_emconf.php
@@ -11,10 +11,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => 'helhum.io',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/fluid/composer.json b/typo3/sysext/fluid/composer.json
index 0085d1c42603ecef49b81a4ec57bb148315d1e40..2d0b2fe286a1e15ab4b2f34197e1b67deb25d8e9 100644
--- a/typo3/sysext/fluid/composer.json
+++ b/typo3/sysext/fluid/composer.json
@@ -20,8 +20,8 @@
 	},
 	"require": {
 		"symfony/dependency-injection": "^5.3.7",
-		"typo3/cms-core": "11.5.*@dev",
-		"typo3/cms-extbase": "11.5.*@dev",
+		"typo3/cms-core": "12.0.*@dev",
+		"typo3/cms-extbase": "12.0.*@dev",
 		"typo3fluid/fluid": "^2.7.1"
 	},
 	"conflict": {
@@ -29,7 +29,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/fluid/ext_emconf.php b/typo3/sysext/fluid/ext_emconf.php
index 7a2d4f6c5687faa1b7874834b89656431b25e609..9f5a3776e3221c18aef3e8a51e4b7d5f977e2be3 100644
--- a/typo3/sysext/fluid/ext_emconf.php
+++ b/typo3/sysext/fluid/ext_emconf.php
@@ -9,11 +9,11 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'core' => '11.5.4',
-            'extbase' => '11.5.4',
+            'core' => '12.0.0',
+            'extbase' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/fluid_styled_content/composer.json b/typo3/sysext/fluid_styled_content/composer.json
index 9941b34fbb6f25ff7e802911244ce1a66ee4299d..a951dcebf6789499e8cd4d0321031b9bd71225c2 100644
--- a/typo3/sysext/fluid_styled_content/composer.json
+++ b/typo3/sysext/fluid_styled_content/composer.json
@@ -19,16 +19,16 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev",
-		"typo3/cms-fluid": "11.5.*@dev",
-		"typo3/cms-frontend": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev",
+		"typo3/cms-fluid": "12.0.*@dev",
+		"typo3/cms-frontend": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/fluid_styled_content/ext_emconf.php b/typo3/sysext/fluid_styled_content/ext_emconf.php
index 66369f12b29efb5beefb94f7e9adcd433c05b0c9..dc9b31159ab459f85831477ec83406d3c6719025 100644
--- a/typo3/sysext/fluid_styled_content/ext_emconf.php
+++ b/typo3/sysext/fluid_styled_content/ext_emconf.php
@@ -7,12 +7,12 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'fluid' => '11.5.4',
-            'frontend' => '11.5.4',
+            'typo3' => '12.0.0',
+            'fluid' => '12.0.0',
+            'frontend' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/form/composer.json b/typo3/sysext/form/composer.json
index 132a13a84d68305cdbd310679fbd39e115f39d02..251ff11409adf6fe92a3d792424925469af557c5 100644
--- a/typo3/sysext/form/composer.json
+++ b/typo3/sysext/form/composer.json
@@ -21,7 +21,7 @@
 	"require": {
 		"psr/http-message": "^1.0",
 		"symfony/expression-language": "^5.3.7",
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-filelist": "Listing of files in the directory",
@@ -32,7 +32,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/form/ext_emconf.php b/typo3/sysext/form/ext_emconf.php
index 01ed544d5d4d01621380d46feeea32c1258762e3..0691b45d5b5bd0f6c8a596d40306c61ae248b2b5 100644
--- a/typo3/sysext/form/ext_emconf.php
+++ b/typo3/sysext/form/ext_emconf.php
@@ -9,15 +9,15 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [
-            'filelist' => '11.5.4',
-            'impexp' => '11.5.4',
+            'filelist' => '12.0.0',
+            'impexp' => '12.0.0',
         ],
     ],
 ];
diff --git a/typo3/sysext/frontend/composer.json b/typo3/sysext/frontend/composer.json
index fbe64b99aa97ce9982193b183975ea216feb3e1f..a686b8485938444d263eaae67463978dc291bdb3 100644
--- a/typo3/sysext/frontend/composer.json
+++ b/typo3/sysext/frontend/composer.json
@@ -21,7 +21,7 @@
 	"require": {
 		"ext-libxml": "*",
 		"symfony/polyfill-mbstring": "^1.23.1",
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -31,7 +31,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/frontend/ext_emconf.php b/typo3/sysext/frontend/ext_emconf.php
index 667aea06602ee8856f28749bf5eb3cc3359784e9..3ac2021b8f2dc3c7d6a43e844ac7178e47c77c24 100644
--- a/typo3/sysext/frontend/ext_emconf.php
+++ b/typo3/sysext/frontend/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/impexp/Tests/Functional/Fixtures/Extensions/template_extension/ext_emconf.php b/typo3/sysext/impexp/Tests/Functional/Fixtures/Extensions/template_extension/ext_emconf.php
index db379b086c2750880adf466319ca415aebb1cee8..e993bc1818cbfa2456d08917f7ea4d18e15b4366 100644
--- a/typo3/sysext/impexp/Tests/Functional/Fixtures/Extensions/template_extension/ext_emconf.php
+++ b/typo3/sysext/impexp/Tests/Functional/Fixtures/Extensions/template_extension/ext_emconf.php
@@ -6,7 +6,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Impexp test extension',
     'description' => '',
     'category' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 1,
     'author' => 'Marc Bastian Heinrichs',
@@ -14,7 +14,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/impexp/composer.json b/typo3/sysext/impexp/composer.json
index 103b0571e4a0c36be33d7c0d11937b766cd889b1..86c2d6b376695cba7376d7dac61835828b7e7bca 100644
--- a/typo3/sysext/impexp/composer.json
+++ b/typo3/sysext/impexp/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/impexp/ext_emconf.php b/typo3/sysext/impexp/ext_emconf.php
index 07a8b63fa16a897ae0dfc6c09a5b687853a4d6fb..e1444c1de249484bdd4f5ab84423bbd1612646ab 100644
--- a/typo3/sysext/impexp/ext_emconf.php
+++ b/typo3/sysext/impexp/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/indexed_search/composer.json b/typo3/sysext/indexed_search/composer.json
index 28e0ebfb317f1a993009f033676cbb43cba0d9e4..ed8d2e164468fad1bf303a9acdb2366ac4c63c6f 100644
--- a/typo3/sysext/indexed_search/composer.json
+++ b/typo3/sysext/indexed_search/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -29,7 +29,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "indexed_search"
diff --git a/typo3/sysext/indexed_search/ext_emconf.php b/typo3/sysext/indexed_search/ext_emconf.php
index 70018a6ee8254993bb60ba5edc62eb9d29c0155b..a18a45099aa7607f7decb409db5310c2453b20f3 100644
--- a/typo3/sysext/indexed_search/ext_emconf.php
+++ b/typo3/sysext/indexed_search/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/info/composer.json b/typo3/sysext/info/composer.json
index a13634f3d4df3cc2a747f862a0380fd22fdb2ea0..b2b2f8e11c66eb0ee961b493e49d6dce1cd03f17 100644
--- a/typo3/sysext/info/composer.json
+++ b/typo3/sysext/info/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -29,7 +29,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/info/ext_emconf.php b/typo3/sysext/info/ext_emconf.php
index c394d3102c6693f2b5ca1068b7c5fab128206c60..ea2a8cf4e802f7082d0bd3a92134ee28f7f9bdcd 100644
--- a/typo3/sysext/info/ext_emconf.php
+++ b/typo3/sysext/info/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/install/composer.json b/typo3/sysext/install/composer.json
index 3ff03d3389e796c81aabe4f6c27f66c07035246b..bc7b9c07b447d9a905634a39c7ac784bc880b4e8 100644
--- a/typo3/sysext/install/composer.json
+++ b/typo3/sysext/install/composer.json
@@ -24,16 +24,16 @@
 		"nikic/php-parser": "^4.10.4",
 		"symfony/finder": "^5.3.7",
 		"symfony/http-foundation": "^5.3.7",
-		"typo3/cms-core": "11.5.*@dev",
-		"typo3/cms-extbase": "11.5.*@dev",
-		"typo3/cms-fluid": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev",
+		"typo3/cms-extbase": "12.0.*@dev",
+		"typo3/cms-fluid": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/install/ext_emconf.php b/typo3/sysext/install/ext_emconf.php
index e3d2172f20cf928c3e19ba8641880aa0a4c25163..7510ac0478be8edec94ed3207b961f20fb8f2011 100644
--- a/typo3/sysext/install/ext_emconf.php
+++ b/typo3/sysext/install/ext_emconf.php
@@ -9,12 +9,12 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'extbase' => '11.5.4',
-            'fluid' => '11.5.4',
+            'typo3' => '12.0.0',
+            'extbase' => '12.0.0',
+            'fluid' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/linkvalidator/composer.json b/typo3/sysext/linkvalidator/composer.json
index 0b0685e624dc0c2ee699de6ee7c9ac56bb894187..5090e6930a32b58939950ace489be2d63eab68d5 100644
--- a/typo3/sysext/linkvalidator/composer.json
+++ b/typo3/sysext/linkvalidator/composer.json
@@ -19,8 +19,8 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev",
-		"typo3/cms-info": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev",
+		"typo3/cms-info": "12.0.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Regular checks of links"
@@ -30,7 +30,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "linkvalidator"
diff --git a/typo3/sysext/linkvalidator/ext_emconf.php b/typo3/sysext/linkvalidator/ext_emconf.php
index 94bffc94dcfa437972034efc805354b1ca947534..a981f999a3b94cc80a6fec2ac13f04f9673f97e3 100644
--- a/typo3/sysext/linkvalidator/ext_emconf.php
+++ b/typo3/sysext/linkvalidator/ext_emconf.php
@@ -9,11 +9,11 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
-            'info' => '11.5.4',
+            'typo3' => '12.0.0',
+            'info' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/lowlevel/composer.json b/typo3/sysext/lowlevel/composer.json
index 5b4cf6dede3e78ea912d7ad734e056534b4d1424..d65877bdf35c59007daa2515005af9832b07a204 100644
--- a/typo3/sysext/lowlevel/composer.json
+++ b/typo3/sysext/lowlevel/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/lowlevel/ext_emconf.php b/typo3/sysext/lowlevel/ext_emconf.php
index e86087a0cfbdb77d3b26b8ebe245b9fb29214537..bead43031e0f69ba6816a69feb8b414844aeafd9 100644
--- a/typo3/sysext/lowlevel/ext_emconf.php
+++ b/typo3/sysext/lowlevel/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/opendocs/composer.json b/typo3/sysext/opendocs/composer.json
index fc3b9d0bd6e935339692fb12e25c18a502a79c85..95f517b08e215a2384c2daba453f6d063f007bfe 100644
--- a/typo3/sysext/opendocs/composer.json
+++ b/typo3/sysext/opendocs/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "opendocs"
diff --git a/typo3/sysext/opendocs/ext_emconf.php b/typo3/sysext/opendocs/ext_emconf.php
index 5d9f423f17b810b24ecab477a971eb4bb49efb06..dbdbb9a9fb05ee0f9940d472e6fb2cc3593564b7 100644
--- a/typo3/sysext/opendocs/ext_emconf.php
+++ b/typo3/sysext/opendocs/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/recordlist/composer.json b/typo3/sysext/recordlist/composer.json
index 2c0689602c7b74fd41e1086ea52a216139527c48..d0a848bb52c435f7ea2585535190a9f29819cdc2 100644
--- a/typo3/sysext/recordlist/composer.json
+++ b/typo3/sysext/recordlist/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/recordlist/ext_emconf.php b/typo3/sysext/recordlist/ext_emconf.php
index 9bd07f8033fb7ad79b36487b310a66dfafa17add..39a0344e146bc002edce393c7eec39230b5af974 100644
--- a/typo3/sysext/recordlist/ext_emconf.php
+++ b/typo3/sysext/recordlist/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/recycler/composer.json b/typo3/sysext/recycler/composer.json
index c5c5f46edd5bc83f6f34e6e6695d2a5643f87fdb..bf556ceaf28ef09efc2c62a1b4d84815cd35a54d 100644
--- a/typo3/sysext/recycler/composer.json
+++ b/typo3/sysext/recycler/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Remove deleted records after given time"
@@ -29,7 +29,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "recycler"
diff --git a/typo3/sysext/recycler/ext_emconf.php b/typo3/sysext/recycler/ext_emconf.php
index a717f797e376d10301e644a8c23a01c59d897575..c93aacfb181492b0b171095f4896885fd002ebac 100644
--- a/typo3/sysext/recycler/ext_emconf.php
+++ b/typo3/sysext/recycler/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/redirects/composer.json b/typo3/sysext/redirects/composer.json
index c86922fd17ec36937e85002af905e941a23e2e84..f6defa26b270fcfc417e431f26fb10edb4ff4f09 100644
--- a/typo3/sysext/redirects/composer.json
+++ b/typo3/sysext/redirects/composer.json
@@ -23,8 +23,8 @@
 		"psr/http-message": "^1.0",
 		"psr/log": "^1.0",
 		"symfony/console": "^5.3.7",
-		"typo3/cms-backend": "11.5.*@dev",
-		"typo3/cms-core": "11.5.*@dev",
+		"typo3/cms-backend": "12.0.*@dev",
+		"typo3/cms-core": "12.0.*@dev",
 		"typo3fluid/fluid": "^2.7.1"
 	},
 	"conflict": {
@@ -36,7 +36,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "redirects",
diff --git a/typo3/sysext/redirects/ext_emconf.php b/typo3/sysext/redirects/ext_emconf.php
index 16f9c7dadc855ff390b91351170962ec9119e144..acb81c33a8f0912019c39d7dd700ee752c7ec5be 100644
--- a/typo3/sysext/redirects/ext_emconf.php
+++ b/typo3/sysext/redirects/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/reports/composer.json b/typo3/sysext/reports/composer.json
index 7ad833e76cb2698c5d7c46e6ec70ecac56afd2cc..3d3de8b1c218ea2d5a8b78e7af431e1795e52218 100644
--- a/typo3/sysext/reports/composer.json
+++ b/typo3/sysext/reports/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Determine system's status and send it via email"
@@ -29,7 +29,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/reports/ext_emconf.php b/typo3/sysext/reports/ext_emconf.php
index 661c7db425879273f465557a98b0556ffbc0c170..7c18ff8947856b6ccdb00a627be7ad841a62ed55 100644
--- a/typo3/sysext/reports/ext_emconf.php
+++ b/typo3/sysext/reports/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/rte_ckeditor/composer.json b/typo3/sysext/rte_ckeditor/composer.json
index 2e58f28a1cf3b182a9450d520c5402bc62df1d38..60d9513ea7927ff6be6275ca4913496b010bf798 100644
--- a/typo3/sysext/rte_ckeditor/composer.json
+++ b/typo3/sysext/rte_ckeditor/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -29,7 +29,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/rte_ckeditor/ext_emconf.php b/typo3/sysext/rte_ckeditor/ext_emconf.php
index fd622d6df9ad3f6359d1b6b56ce0faa1b5435ad8..aead054e910022bdb0a8119c7e17bb59cd3300bc 100644
--- a/typo3/sysext/rte_ckeditor/ext_emconf.php
+++ b/typo3/sysext/rte_ckeditor/ext_emconf.php
@@ -8,14 +8,14 @@ $EM_CONF[$_EXTKEY] = [
     'clearCacheOnLoad' => 0,
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [
-            'setup' => '11.5.4',
+            'setup' => '12.0.0',
         ],
     ],
 ];
diff --git a/typo3/sysext/scheduler/composer.json b/typo3/sysext/scheduler/composer.json
index 8e99a3a4cb4cc8b8dabdd184a1a945658eb8b8de..08ac3ba4271a636857ece753f1d0254c984ae07f 100644
--- a/typo3/sysext/scheduler/composer.json
+++ b/typo3/sysext/scheduler/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "scheduler"
diff --git a/typo3/sysext/scheduler/ext_emconf.php b/typo3/sysext/scheduler/ext_emconf.php
index 12baf44f6096cd410086d4acae6bf3cdb7a12d42..e1e36325862b527cbfb139b4c3f5e672fb2b2b43 100644
--- a/typo3/sysext/scheduler/ext_emconf.php
+++ b/typo3/sysext/scheduler/ext_emconf.php
@@ -4,7 +4,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Scheduler',
     'description' => 'The TYPO3 Scheduler lets you register tasks to happen at a specific time',
     'category' => 'misc',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
     'author' => 'TYPO3 Core Team',
@@ -12,7 +12,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/seo/composer.json b/typo3/sysext/seo/composer.json
index 53784d781f4373d03b456f14a0c48db21ba09230..74ce3a9ac8c8a5cb710671fb1251aea14f63af58 100644
--- a/typo3/sysext/seo/composer.json
+++ b/typo3/sysext/seo/composer.json
@@ -19,16 +19,16 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev",
-		"typo3/cms-frontend": "11.5.*@dev",
-		"typo3/cms-extbase": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev",
+		"typo3/cms-frontend": "12.0.*@dev",
+		"typo3/cms-extbase": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "seo",
diff --git a/typo3/sysext/seo/ext_emconf.php b/typo3/sysext/seo/ext_emconf.php
index 86de1d8b00b21aa275bcfd4613bc8cb052a50460..a158d28e3303e5c2fc0ab5e04ae75cb2afd00e35 100644
--- a/typo3/sysext/seo/ext_emconf.php
+++ b/typo3/sysext/seo/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/setup/composer.json b/typo3/sysext/setup/composer.json
index 4aca3233f9ce87d46fbb834e17f1017aa01a4393..1c35e904aa540e468d66b7b6af504afed819bf26 100644
--- a/typo3/sysext/setup/composer.json
+++ b/typo3/sysext/setup/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/setup/ext_emconf.php b/typo3/sysext/setup/ext_emconf.php
index e1ecaff749485d1d514a42c47d8c75c796a267f7..d805ca18e7fc125adbfe1c0ec55952e3ee44f994 100644
--- a/typo3/sysext/setup/ext_emconf.php
+++ b/typo3/sysext/setup/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/sys_note/composer.json b/typo3/sysext/sys_note/composer.json
index 789ffda575d7bfb2e19c62dd8b299fa4c5432148..e29f930471c0c0bd1093c4973b5060b7c947def9 100644
--- a/typo3/sysext/sys_note/composer.json
+++ b/typo3/sysext/sys_note/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/sys_note/ext_emconf.php b/typo3/sysext/sys_note/ext_emconf.php
index 5068151727d52b3c7b02ea1dc4786903adc0ab8f..9453ac025b5c857c43511212a20b1ba8d5646bf5 100644
--- a/typo3/sysext/sys_note/ext_emconf.php
+++ b/typo3/sysext/sys_note/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/t3editor/composer.json b/typo3/sysext/t3editor/composer.json
index 4f938d08433bee53ce669a830464c6c69c0b9448..f2c151cd7d3aa968555fee127206bd55a999deac 100644
--- a/typo3/sysext/t3editor/composer.json
+++ b/typo3/sysext/t3editor/composer.json
@@ -20,14 +20,14 @@
 	},
 	"require": {
 		"ext-libxml": "*",
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/t3editor/ext_emconf.php b/typo3/sysext/t3editor/ext_emconf.php
index c6d01cb7c78ef5ae2265ee9b53282129667a5215..7e5dedd6f7e4c9febafa5606086a296882482fee 100644
--- a/typo3/sysext/t3editor/ext_emconf.php
+++ b/typo3/sysext/t3editor/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/tstemplate/composer.json b/typo3/sysext/tstemplate/composer.json
index 8d4a41f8134dd26d1884db8d3a5b4620b1e82ad7..8d162c5c165c0ede2a5c80aaa61d2d005f5c4ee1 100644
--- a/typo3/sysext/tstemplate/composer.json
+++ b/typo3/sysext/tstemplate/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/tstemplate/ext_emconf.php b/typo3/sysext/tstemplate/ext_emconf.php
index 22fe3871b0793f5701fb59f476a9ddeb97704334..a0e7eee0499302cd29fcae224c7fdf76f679d62a 100644
--- a/typo3/sysext/tstemplate/ext_emconf.php
+++ b/typo3/sysext/tstemplate/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/viewpage/composer.json b/typo3/sysext/viewpage/composer.json
index 99fd5d46d7169539956196257c84162bf0c6032e..9311c4216fa272b7253fc414c5d75063e25dc058 100644
--- a/typo3/sysext/viewpage/composer.json
+++ b/typo3/sysext/viewpage/composer.json
@@ -19,14 +19,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/viewpage/ext_emconf.php b/typo3/sysext/viewpage/ext_emconf.php
index 9774890586adb158a0d6e1440314fe054763d696..c2ef595e83352447798e4846dbc308be3f5bce9f 100644
--- a/typo3/sysext/viewpage/ext_emconf.php
+++ b/typo3/sysext/viewpage/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/workspaces/composer.json b/typo3/sysext/workspaces/composer.json
index 4a1e682156821d09d1adbff9bde756eaf60f069c..0b1bc8965714c66f523584b00e443f397e27f327 100644
--- a/typo3/sysext/workspaces/composer.json
+++ b/typo3/sysext/workspaces/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "11.5.*@dev"
+		"typo3/cms-core": "12.0.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -29,7 +29,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "11.5.x-dev"
+			"dev-master": "12.0.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "workspaces"
diff --git a/typo3/sysext/workspaces/ext_emconf.php b/typo3/sysext/workspaces/ext_emconf.php
index 6ca02ee4c21e963a50d91b09265bda6d68d40d03..208373d7453641292d765295c32f2a18959a8eff 100644
--- a/typo3/sysext/workspaces/ext_emconf.php
+++ b/typo3/sysext/workspaces/ext_emconf.php
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 1,
-    'version' => '11.5.4',
+    'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.4',
+            'typo3' => '12.0.0',
         ],
         'conflicts' => [],
         'suggests' => [],