diff --git a/composer.json b/composer.json
index 12803ca601dfff6c5bed5be6239ff9ccb596139b..1d3cbbc490289a765ee87f2504054160e61a7315 100644
--- a/composer.json
+++ b/composer.json
@@ -111,7 +111,7 @@
 			"always-add-alias-loader": true
 		},
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		}
 	},
 	"scripts": {
diff --git a/composer.lock b/composer.lock
index 2e11465c19e8a10c1b865725b27e82c3fb36c634..147527512866d04a3d14a143991643c07b3e3760 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": "5ecf79898d6ee3254f173cd59c27d260",
+    "content-hash": "2afcc22996d9961ff9e4e2775e7a01a6",
     "packages": [
         {
             "name": "cogpowered/finediff",
@@ -6211,8 +6211,8 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "role": "lead",
-                    "email": "sebastian@phpunit.de"
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
                 }
             ],
             "description": "Utility class for timing",
@@ -7079,8 +7079,8 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "role": "lead",
-                    "email": "sebastian@phpunit.de"
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
                 }
             ],
             "description": "Collection of value objects that represent the types of the PHP type system",
diff --git a/typo3/sysext/about/composer.json b/typo3/sysext/about/composer.json
index 8a41151adc6af74c2a0790b6a1cfb9c56fac029b..d72985eb441d3d29934db76361f2a236fbf1fbb2 100644
--- a/typo3/sysext/about/composer.json
+++ b/typo3/sysext/about/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/about/ext_emconf.php b/typo3/sysext/about/ext_emconf.php
index b417ea1f3510dc370f03b6a132161efde4be60e9..f9d739953a01d7d16a7d51b16451c169b844571e 100644
--- a/typo3/sysext/about/ext_emconf.php
+++ b/typo3/sysext/about/ext_emconf.php
@@ -7,10 +7,10 @@ $EM_CONF[$_EXTKEY] = [
     'clearCacheOnLoad' => 0,
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/adminpanel/composer.json b/typo3/sysext/adminpanel/composer.json
index c9d2fd4fc057e86444c7ac74f60929ed125c2524..9c036ca28bad662ad9fcf1bb88a877d279e18e2e 100644
--- a/typo3/sysext/adminpanel/composer.json
+++ b/typo3/sysext/adminpanel/composer.json
@@ -13,10 +13,10 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-backend": "10.3.0",
-		"typo3/cms-core": "10.3.0",
-		"typo3/cms-fluid": "10.3.0",
-		"typo3/cms-frontend": "10.3.0",
+		"typo3/cms-backend": "10.4.*@dev",
+		"typo3/cms-core": "10.4.*@dev",
+		"typo3/cms-fluid": "10.4.*@dev",
+		"typo3/cms-frontend": "10.4.*@dev",
 		"typo3fluid/fluid": "^2.6.8",
 		"psr/http-message": "^1.0",
 		"psr/http-server-handler": "^1.0",
@@ -28,7 +28,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/adminpanel/ext_emconf.php b/typo3/sysext/adminpanel/ext_emconf.php
index 3c1e4c4d1c0d8ce952062de02ac88a4784bcfa51..e80b7c469e08dbfe596dd515e7ca85395913f9dc 100644
--- a/typo3/sysext/adminpanel/ext_emconf.php
+++ b/typo3/sysext/adminpanel/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         '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 10fb96662442c699748b057a5ed134dcd5123ec1..2a671acb5d703ac06611c876b38dbe089a7efa59 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
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         '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 bf6d782260160b0691e43a135b436083048dcb0a..e948118b6c6ea19b3bc2957773aa8a390e98a283 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
@@ -9,11 +9,11 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
-            'a' => '10.3.0',
+            'typo3' => '10.4.0',
+            'a' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/backend/composer.json b/typo3/sysext/backend/composer.json
index 8d31cd9b9f14000e8544ae7cd08b798b30c51f40..08601d12806d8d92ba7b998ebcbf7acef39f69c3 100644
--- a/typo3/sysext/backend/composer.json
+++ b/typo3/sysext/backend/composer.json
@@ -14,8 +14,8 @@
 	},
 	"require": {
 		"psr/event-dispatcher": "^1.0",
-		"typo3/cms-core": "10.3.0",
-		"typo3/cms-recordlist": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev",
+		"typo3/cms-recordlist": "10.4.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-install": "To generate url to install tool in environment toolbar"
@@ -32,7 +32,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/backend/ext_emconf.php b/typo3/sysext/backend/ext_emconf.php
index 9e87c5e0b769e4921ae0dbee82be4b286e4b1176..06f8bf677bfcb1719b80a5e9871d52ed8cdda6ed 100644
--- a/typo3/sysext/backend/ext_emconf.php
+++ b/typo3/sysext/backend/ext_emconf.php
@@ -8,11 +8,11 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
-            'recordlist' => '10.3.0',
+            'typo3' => '10.4.0',
+            'recordlist' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/belog/composer.json b/typo3/sysext/belog/composer.json
index 651936758878050c46d49accd25f2b398aab179d..7bbea36bc039d2100dfb3d59f266cecbef4a365c 100644
--- a/typo3/sysext/belog/composer.json
+++ b/typo3/sysext/belog/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/belog/ext_emconf.php b/typo3/sysext/belog/ext_emconf.php
index d295209bf82e5e4798e437d766ad57ba1fa93ce5..08144225835dc6fa882a93c9de251921584970d0 100644
--- a/typo3/sysext/belog/ext_emconf.php
+++ b/typo3/sysext/belog/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/beuser/composer.json b/typo3/sysext/beuser/composer.json
index 50eae3cf975382ad80bbfb1f2491fdb3392244e6..3951abcf4ca81e6d4e6ac4bec0a0cfb6941e8c06 100644
--- a/typo3/sysext/beuser/composer.json
+++ b/typo3/sysext/beuser/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/beuser/ext_emconf.php b/typo3/sysext/beuser/ext_emconf.php
index 075989b4c67478c730120fdd1708e75f3aedbeb1..0831264e9bf857d7ec045f7f2cee0b83bc330034 100644
--- a/typo3/sysext/beuser/ext_emconf.php
+++ b/typo3/sysext/beuser/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/core/Classes/Information/Typo3Version.php b/typo3/sysext/core/Classes/Information/Typo3Version.php
index cf8fc4b7b79ada5e74f5d759267f3910cdba01ac..de12a6f97e57ddc2399a8362fb60beab74ef0db6 100644
--- a/typo3/sysext/core/Classes/Information/Typo3Version.php
+++ b/typo3/sysext/core/Classes/Information/Typo3Version.php
@@ -17,8 +17,8 @@ namespace TYPO3\CMS\Core\Information;
 
 class Typo3Version
 {
-    protected const VERSION = '10.3.0';
-    protected const BRANCH = '10.3';
+    protected const VERSION = '10.4.0';
+    protected const BRANCH = '10.4';
 
     /**
      * Define constants used up until TYPO3 v10, this constructor can be removed in TYPO3 v11.
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 8fa3b710576d68410b821250cdd837eb97c87260..f30e64d617c2e1845e0a741bf255f73695d9f7ad 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
@@ -3,7 +3,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'test extension',
     'description' => '',
     'category' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Christian Kuhn',
@@ -11,7 +11,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         '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 a5c61dd93dd28488a23e06204356e3338dbece34..e7125df50e99b1f60d5ba60c3f9c4248e78ae5ca 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
@@ -3,14 +3,14 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'ExpressionBuilder Test',
     'description' => 'ExpressionBuilder Test',
     'category' => 'example',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Christian Kuhn',
     'author_email' => 'lolli@schwarzbu.ch',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         '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 efc87280776b186d34873acdcfbaafb74702e819..ccc8865f2546fdde4e1583ae453349f5c8e06449 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
@@ -3,7 +3,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Fixture extension for functional tests for Inline Relational Record Editing IRRE',
     'description' => 'based on irre_tutorial extension created by Oliver Hader, see http://forge.typo3.org/projects/extension-irre_tutorial',
     'category' => 'example',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Oliver Hader',
@@ -11,8 +11,8 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
-            'workspaces' => '10.3.0',
+            'typo3' => '10.4.0',
+            'workspaces' => '10.4.0',
         ],
         '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 3d32d11f2fba81a9f7b81050cd04df54871d2b3c..5efc27414186ea911c82f521c7b44f364dba2277 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
@@ -3,7 +3,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'DataHandler Test',
     'description' => 'DataHandler Test',
     'category' => 'example',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Oliver Hader',
@@ -11,8 +11,8 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
-            'workspaces' => '10.3.0',
+            'typo3' => '10.4.0',
+            'workspaces' => '10.4.0',
         ],
         '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 1f28aec3ea4285b29419f50265e4d520056217d8..dc7a5ffdc0cf0aed2e234c2d818a8f44b5542e78 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
@@ -3,7 +3,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'MetaData Test',
     'description' => 'MetaData Test',
     'category' => 'example',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Frank Nägler',
@@ -11,8 +11,8 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
-            'seo' => '10.3.0',
+            'typo3' => '10.4.0',
+            'seo' => '10.4.0',
         ],
         '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 2b28d8b9c15b8733ef8aaff5bb4e7b25c6c1ae6b..08d6d746cec40a2fc9607cd7740d925e4fddcd59 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
@@ -3,7 +3,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Test Resources',
     'description' => 'Test Resources',
     'category' => 'example',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Oliver Hader',
@@ -11,7 +11,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0'
+            'typo3' => '10.4.0'
         ],
         '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 09fa0569c00e8714a43c924b7d1d2ad056641592..2a4eb016b2cfa1748b318885ce6eb17cce36c673 100644
--- a/typo3/sysext/core/Tests/Unit/Utility/Fixtures/ext_emconf.php
+++ b/typo3/sysext/core/Tests/Unit/Utility/Fixtures/ext_emconf.php
@@ -8,7 +8,7 @@ $EM_CONF[$_EXTKEY] = [
     'author' => '',
     'author_email' => '',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [],
         'conflicts' => [],
diff --git a/typo3/sysext/core/composer.json b/typo3/sysext/core/composer.json
index f5868555f6c1809f6084d3acb43528e1a3a8339d..abf2cf2e522563ebbbba216951a909c573a5c2a3 100644
--- a/typo3/sysext/core/composer.json
+++ b/typo3/sysext/core/composer.json
@@ -87,7 +87,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/core/ext_emconf.php b/typo3/sysext/core/ext_emconf.php
index cde90f7ca9d1d6d5027683771d72eb9994f762bb..624f17570ef7f72ed6859a7b45823c2ee27dffeb 100644
--- a/typo3/sysext/core/ext_emconf.php
+++ b/typo3/sysext/core/ext_emconf.php
@@ -8,7 +8,7 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [],
         'conflicts' => [],
diff --git a/typo3/sysext/dashboard/composer.json b/typo3/sysext/dashboard/composer.json
index 3cb3aca7b55d30a3d331b4778fa3809279ec668d..e0d73d0a72deeaf33a8acec366e6863fda374a2e 100644
--- a/typo3/sysext/dashboard/composer.json
+++ b/typo3/sysext/dashboard/composer.json
@@ -13,18 +13,18 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0",
-		"typo3/cms-frontend": "10.3.0",
-		"typo3/cms-backend": "10.3.0",
-		"typo3/cms-fluid": "10.3.0",
-		"typo3/cms-extbase": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev",
+		"typo3/cms-frontend": "10.4.*@dev",
+		"typo3/cms-backend": "10.4.*@dev",
+		"typo3/cms-fluid": "10.4.*@dev",
+		"typo3/cms-extbase": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "dashboard",
diff --git a/typo3/sysext/dashboard/ext_emconf.php b/typo3/sysext/dashboard/ext_emconf.php
index 530b94487e50df50a749ae332a2803138f80d3eb..bcc57cb94ab49f208294cacc5f073da7606d152f 100644
--- a/typo3/sysext/dashboard/ext_emconf.php
+++ b/typo3/sysext/dashboard/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0'
+            'typo3' => '10.4.0'
         ],
         '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 1c421106409d8d0375773410a10e987c224eca6d..3b81f035e76a4410ae4b455e10653321a43d573e 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
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_email' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 1,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         '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 10fb96662442c699748b057a5ed134dcd5123ec1..2a671acb5d703ac06611c876b38dbe089a7efa59 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
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         '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 10fb96662442c699748b057a5ed134dcd5123ec1..2a671acb5d703ac06611c876b38dbe089a7efa59 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
@@ -9,10 +9,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'uploadfolder' => 0,
     'clearCacheOnLoad' => 1,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/extbase/composer.json b/typo3/sysext/extbase/composer.json
index 90dd10b668be83354902e883d4f6a8cf51e8a278..b918c56fc1e329e850fc9f4e8465f064caa03859 100644
--- a/typo3/sysext/extbase/composer.json
+++ b/typo3/sysext/extbase/composer.json
@@ -18,7 +18,7 @@
 		"symfony/dependency-injection": "^4.4 || ^5.0",
 		"symfony/property-access": "^4.4 || ^5.0",
 		"symfony/property-info": "^4.4 || ^5.0",
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Additional scheduler tasks"
@@ -28,7 +28,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/extbase/ext_emconf.php b/typo3/sysext/extbase/ext_emconf.php
index a35575a94267f87687df19c54c6155edff8c1d43..eaff78f2674623d8c3389cdff3c6269454651d50 100644
--- a/typo3/sysext/extbase/ext_emconf.php
+++ b/typo3/sysext/extbase/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 1,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/extensionmanager/composer.json b/typo3/sysext/extensionmanager/composer.json
index 892a84b947b8c249c41df506852ed497c481ad4c..f307ffb26ead8cb58cd33474bb7012b21e4df645 100644
--- a/typo3/sysext/extensionmanager/composer.json
+++ b/typo3/sysext/extensionmanager/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/extensionmanager/ext_emconf.php b/typo3/sysext/extensionmanager/ext_emconf.php
index c07e8834ef9ddce515ca5b76a17db000887aaa2c..4626697fa6085c37328186c0c0183eaf42c6481e 100644
--- a/typo3/sysext/extensionmanager/ext_emconf.php
+++ b/typo3/sysext/extensionmanager/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/felogin/composer.json b/typo3/sysext/felogin/composer.json
index 8e30555cd79e35261db663719c02eaff49eaef95..742587a475a1be92b0c8e97177fb214cc9989481 100644
--- a/typo3/sysext/felogin/composer.json
+++ b/typo3/sysext/felogin/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/felogin/ext_emconf.php b/typo3/sysext/felogin/ext_emconf.php
index 0a32226f1f97a5bc874a1296527237bac47d7afc..3c220ce368695756ad9d4ebb5a0020ed3da97ebf 100644
--- a/typo3/sysext/felogin/ext_emconf.php
+++ b/typo3/sysext/felogin/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 1,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/filelist/composer.json b/typo3/sysext/filelist/composer.json
index ed4318ec9eef75d3e9c29f3b8bd8ab949ee38442..61908d8d8a70045eccc7ce57d1aa1d4ecd3e2acc 100644
--- a/typo3/sysext/filelist/composer.json
+++ b/typo3/sysext/filelist/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/filelist/ext_emconf.php b/typo3/sysext/filelist/ext_emconf.php
index 0a237485bd832f2867bf9024933f0cade7e8a3e1..3a2cfad2a6178818d2c09aa70e121606f463c257 100644
--- a/typo3/sysext/filelist/ext_emconf.php
+++ b/typo3/sysext/filelist/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/filemetadata/composer.json b/typo3/sysext/filemetadata/composer.json
index 86e466fe719c6def6eb61f30fe2629d62661d5c7..9fcafe4c16108b6a55fa0b7e50897819bec5fbdc 100644
--- a/typo3/sysext/filemetadata/composer.json
+++ b/typo3/sysext/filemetadata/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "filemetadata"
diff --git a/typo3/sysext/filemetadata/ext_emconf.php b/typo3/sysext/filemetadata/ext_emconf.php
index b96065e10523e196e0b642e65268450f3e43f67a..534170c53311ff4e333f77f9ebe28bc757657fca 100644
--- a/typo3/sysext/filemetadata/ext_emconf.php
+++ b/typo3/sysext/filemetadata/ext_emconf.php
@@ -7,10 +7,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_email' => 'typo3cms@typo3.org',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         '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 bc355f673a537ccfdb50ca0955e49d310a6508e3..b3344f986d9db8d09e46b856a39dda985549ed42 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
@@ -48,7 +48,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "10.3.x-dev"
+            "dev-master": "10.4.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 b374b6e07375abf55452f7a401cc83d7a172f78a..a5c26397b68849af18f0a5f2c3b2f29658859ce3 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
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => 'helhum.io',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/fluid/composer.json b/typo3/sysext/fluid/composer.json
index 758c0e243451056767d5c04ff76312f8f76ea0bd..6a101cbd4c54ed5ccbf3e2b6f8f32cebb0e30251 100644
--- a/typo3/sysext/fluid/composer.json
+++ b/typo3/sysext/fluid/composer.json
@@ -14,8 +14,8 @@
 	},
 	"require": {
 		"symfony/dependency-injection": "^4.4 || ^5.0",
-		"typo3/cms-core": "10.3.0",
-		"typo3/cms-extbase": "10.3.0",
+		"typo3/cms-core": "10.4.*@dev",
+		"typo3/cms-extbase": "10.4.*@dev",
 		"typo3fluid/fluid": "^2.6.8"
 	},
 	"conflict": {
@@ -23,7 +23,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/fluid/ext_emconf.php b/typo3/sysext/fluid/ext_emconf.php
index 8b8c230edec80607d35b3311d719cb955ad3055b..fe7bbce30aeb22a5a034450559259a65754c2503 100644
--- a/typo3/sysext/fluid/ext_emconf.php
+++ b/typo3/sysext/fluid/ext_emconf.php
@@ -8,11 +8,11 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'core' => '10.3.0',
-            'extbase' => '10.3.0',
+            'core' => '10.4.0',
+            'extbase' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/fluid_styled_content/composer.json b/typo3/sysext/fluid_styled_content/composer.json
index bf09d6924f6e3f23960524d6b616779a2ffa24c1..81d6ae274a49d712c4c161ec036984018bbf4392 100644
--- a/typo3/sysext/fluid_styled_content/composer.json
+++ b/typo3/sysext/fluid_styled_content/composer.json
@@ -13,16 +13,16 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0",
-		"typo3/cms-fluid": "10.3.0",
-		"typo3/cms-frontend": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev",
+		"typo3/cms-fluid": "10.4.*@dev",
+		"typo3/cms-frontend": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.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 7b385e921a3e88f98d12857acc7eadad8cd5bdd8..2d121c247ade4f0ca08d6cb3ca3d3286f1bdf715 100644
--- a/typo3/sysext/fluid_styled_content/ext_emconf.php
+++ b/typo3/sysext/fluid_styled_content/ext_emconf.php
@@ -6,12 +6,12 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
-            'fluid' => '10.3.0',
-            'frontend' => '10.3.0',
+            'typo3' => '10.4.0',
+            'fluid' => '10.4.0',
+            'frontend' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/form/Tests/Functional/Hooks/Fixtures/test_resources/ext_emconf.php b/typo3/sysext/form/Tests/Functional/Hooks/Fixtures/test_resources/ext_emconf.php
index 2b28d8b9c15b8733ef8aaff5bb4e7b25c6c1ae6b..08d6d746cec40a2fc9607cd7740d925e4fddcd59 100644
--- a/typo3/sysext/form/Tests/Functional/Hooks/Fixtures/test_resources/ext_emconf.php
+++ b/typo3/sysext/form/Tests/Functional/Hooks/Fixtures/test_resources/ext_emconf.php
@@ -3,7 +3,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Test Resources',
     'description' => 'Test Resources',
     'category' => 'example',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 0,
     'author' => 'Oliver Hader',
@@ -11,7 +11,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0'
+            'typo3' => '10.4.0'
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/form/composer.json b/typo3/sysext/form/composer.json
index 2a527eef83298643513abe7afe58fc7271a3fcf9..a8cf781788eb842a416cf61d5638baa576017db8 100644
--- a/typo3/sysext/form/composer.json
+++ b/typo3/sysext/form/composer.json
@@ -15,7 +15,7 @@
 	"require": {
 		"psr/http-message": "^1.0",
 		"symfony/expression-language": "^4.4 || ^5.0",
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-filelist": "Listing of files in the directory",
@@ -26,7 +26,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/form/ext_emconf.php b/typo3/sysext/form/ext_emconf.php
index 63ca57a6b4e0e0d361a8dd8b829e289245f83687..89b620085d0dd2886b66619e8d3aafa3af589f9e 100644
--- a/typo3/sysext/form/ext_emconf.php
+++ b/typo3/sysext/form/ext_emconf.php
@@ -8,15 +8,15 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [
-            'filelist' => '10.3.0',
-            'impexp' => '10.3.0',
+            'filelist' => '10.4.0',
+            'impexp' => '10.4.0',
         ],
     ],
 ];
diff --git a/typo3/sysext/frontend/composer.json b/typo3/sysext/frontend/composer.json
index 8155b5195d9f8f00f872a1cff084ba4a1f524b6a..c26f81a850d0fdb588aae767afa1b9d5adee5cb7 100644
--- a/typo3/sysext/frontend/composer.json
+++ b/typo3/sysext/frontend/composer.json
@@ -13,7 +13,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -23,7 +23,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/frontend/ext_emconf.php b/typo3/sysext/frontend/ext_emconf.php
index 7cb92f3f2c5eab1ef0b634fd859e578f5dd1dbdd..1e5f611c84f5ad9f30219ebd7b7d743d7cc7c4f3 100644
--- a/typo3/sysext/frontend/ext_emconf.php
+++ b/typo3/sysext/frontend/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         '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 d74354469c188886da0a4937ce4e5f57ca6b1503..f3f46b175cbc06fd89615952b9d6038c75ccba7c 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
@@ -4,7 +4,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Impexp test extension',
     'description' => '',
     'category' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'state' => 'beta',
     'clearCacheOnLoad' => 1,
     'author' => 'Marc Bastian Heinrichs',
@@ -12,7 +12,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/impexp/composer.json b/typo3/sysext/impexp/composer.json
index 76a93dc92eef8b0361a628ef7ea26e9d798052eb..dad2cbcf6a33d6f97067e3404e97d781132e8c0c 100644
--- a/typo3/sysext/impexp/composer.json
+++ b/typo3/sysext/impexp/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/impexp/ext_emconf.php b/typo3/sysext/impexp/ext_emconf.php
index 4a536e55a182bd041cd50a8c6d8bd4941cc8bd7e..b0f5afbe7a7499d45eefecca23caf8561ccd30d6 100644
--- a/typo3/sysext/impexp/ext_emconf.php
+++ b/typo3/sysext/impexp/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/indexed_search/composer.json b/typo3/sysext/indexed_search/composer.json
index 3bce4c92b6dfdb8e949b1ab2d73ffada07442c1f..bc72efa637d9a4a6c1ac2518fea4460ad91072a5 100644
--- a/typo3/sysext/indexed_search/composer.json
+++ b/typo3/sysext/indexed_search/composer.json
@@ -13,7 +13,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -23,7 +23,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.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 760bdad27ea536f0fa9b562ef89ceb5c5d64dc34..25846b336bdabd4ec9ec056569bf833ac89c55fd 100644
--- a/typo3/sysext/indexed_search/ext_emconf.php
+++ b/typo3/sysext/indexed_search/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/info/composer.json b/typo3/sysext/info/composer.json
index 23c699c40f6a9c4743bdf3cd7da6dacf11c5d902..a94e93fcdae5a4d3fbc4f345dc404bc0b768d1e5 100644
--- a/typo3/sysext/info/composer.json
+++ b/typo3/sysext/info/composer.json
@@ -13,7 +13,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -23,7 +23,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/info/ext_emconf.php b/typo3/sysext/info/ext_emconf.php
index caa714ffd82171bda020b9a0e99cc4283e02c8f1..a06c70a4f06d64283bd88ff884476fd37d925bdc 100644
--- a/typo3/sysext/info/ext_emconf.php
+++ b/typo3/sysext/info/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/install/composer.json b/typo3/sysext/install/composer.json
index 7ba5628adb52a1f7ab03be527dbb458f1bf7acb6..46d8b338170f82d6a4690e832ee5020fbdfce7ee 100644
--- a/typo3/sysext/install/composer.json
+++ b/typo3/sysext/install/composer.json
@@ -15,16 +15,16 @@
 	"require": {
 		"nikic/php-parser": "^4.3",
 		"symfony/finder": "^4.4 || ^5.0",
-		"typo3/cms-core": "10.3.0",
-		"typo3/cms-extbase": "10.3.0",
-		"typo3/cms-fluid": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev",
+		"typo3/cms-extbase": "10.4.*@dev",
+		"typo3/cms-fluid": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/install/ext_emconf.php b/typo3/sysext/install/ext_emconf.php
index f0e7dd9f9e5294fa6ff4279334909accacd9d384..83c4e7d0ad17056b7f31f3b9dfdc4f0be413bb4f 100644
--- a/typo3/sysext/install/ext_emconf.php
+++ b/typo3/sysext/install/ext_emconf.php
@@ -8,12 +8,12 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
-            'extbase' => '10.3.0',
-            'fluid' => '10.3.0',
+            'typo3' => '10.4.0',
+            'extbase' => '10.4.0',
+            'fluid' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/linkvalidator/composer.json b/typo3/sysext/linkvalidator/composer.json
index b19c1ed030809873094239534f5083aa6c3c14a8..8ff3762b68b2fe0a756d48b7dd894417cdfdf127 100644
--- a/typo3/sysext/linkvalidator/composer.json
+++ b/typo3/sysext/linkvalidator/composer.json
@@ -13,8 +13,8 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0",
-		"typo3/cms-info": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev",
+		"typo3/cms-info": "10.4.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Regular checks of links"
@@ -24,7 +24,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "linkvalidator"
diff --git a/typo3/sysext/linkvalidator/ext_emconf.php b/typo3/sysext/linkvalidator/ext_emconf.php
index 8219af1a76622390ebfde1610b2be60d583289f5..b7933efdd25d7a858a1c01dc0c0eb80177d960c7 100644
--- a/typo3/sysext/linkvalidator/ext_emconf.php
+++ b/typo3/sysext/linkvalidator/ext_emconf.php
@@ -8,11 +8,11 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
-            'info' => '10.3.0',
+            'typo3' => '10.4.0',
+            'info' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/lowlevel/composer.json b/typo3/sysext/lowlevel/composer.json
index aa76973acd24d3290ce029538e284e1c77847923..7d5bba8506c8b2956d0f41077cb1dcc90f74af05 100644
--- a/typo3/sysext/lowlevel/composer.json
+++ b/typo3/sysext/lowlevel/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/lowlevel/ext_emconf.php b/typo3/sysext/lowlevel/ext_emconf.php
index ff5fca3ca8141972fa9f11a421d6db62d9b1fe38..ed4ed358722af965623bf2a5a23779e6c33950a3 100644
--- a/typo3/sysext/lowlevel/ext_emconf.php
+++ b/typo3/sysext/lowlevel/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/opendocs/composer.json b/typo3/sysext/opendocs/composer.json
index 6095c9774d82a8b0bb2c30a75d2187a61c8fae76..f1fab403c8b617966f6c55d2338cb3a938e89ddb 100644
--- a/typo3/sysext/opendocs/composer.json
+++ b/typo3/sysext/opendocs/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "opendocs"
diff --git a/typo3/sysext/opendocs/ext_emconf.php b/typo3/sysext/opendocs/ext_emconf.php
index 5365301c8329762f1440f3f0f6f627ae2a88db40..f9936a1fbfed609c3cb3a3314e40e27dff713e4d 100644
--- a/typo3/sysext/opendocs/ext_emconf.php
+++ b/typo3/sysext/opendocs/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/recordlist/composer.json b/typo3/sysext/recordlist/composer.json
index 4536e9cb85b10c2a0b8a90299bce937bed0b2c54..b6541849285068bb7c0d890822642eedc820cd89 100644
--- a/typo3/sysext/recordlist/composer.json
+++ b/typo3/sysext/recordlist/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/recordlist/ext_emconf.php b/typo3/sysext/recordlist/ext_emconf.php
index 5db461d9606006010aae97942fa303295f9555d7..6606ac2cc87dcc27e0c7617a293744125dc7e4ed 100644
--- a/typo3/sysext/recordlist/ext_emconf.php
+++ b/typo3/sysext/recordlist/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/recycler/composer.json b/typo3/sysext/recycler/composer.json
index b30925c1b2328d1ddc6fa6a48c06689c196e33dd..c38570508639f4284414ac553d0a20022f3b57f9 100644
--- a/typo3/sysext/recycler/composer.json
+++ b/typo3/sysext/recycler/composer.json
@@ -13,7 +13,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Remove deleted records after given time"
@@ -23,7 +23,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "recycler"
diff --git a/typo3/sysext/recycler/ext_emconf.php b/typo3/sysext/recycler/ext_emconf.php
index 552b438b9ecb77bcec6c44224dad61e09143ab2c..5e735dd85b5cf17acbfa296738ac2ccb438db956 100644
--- a/typo3/sysext/recycler/ext_emconf.php
+++ b/typo3/sysext/recycler/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/redirects/composer.json b/typo3/sysext/redirects/composer.json
index 41dbf9ab14c5ef0068302ce3f08e00b7e69ae5f9..970130f16a57eb014a356c9364534719f6c19904 100644
--- a/typo3/sysext/redirects/composer.json
+++ b/typo3/sysext/redirects/composer.json
@@ -16,8 +16,8 @@
 		"doctrine/dbal": "^2.10",
 		"psr/http-message": "^1.0",
 		"psr/log": "^1.0",
-		"typo3/cms-backend": "10.3.0",
-		"typo3/cms-core": "10.3.0",
+		"typo3/cms-backend": "10.4.*@dev",
+		"typo3/cms-core": "10.4.*@dev",
 		"typo3fluid/fluid": "^2.6.8"
 	},
 	"conflict": {
@@ -29,7 +29,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "redirects",
diff --git a/typo3/sysext/redirects/ext_emconf.php b/typo3/sysext/redirects/ext_emconf.php
index 3b3372a110983504097875c7d8b2098e3daec064..a70717b4ffc4639bebbe8c47772c6397a8909bfc 100644
--- a/typo3/sysext/redirects/ext_emconf.php
+++ b/typo3/sysext/redirects/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0'
+            'typo3' => '10.4.0'
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/reports/composer.json b/typo3/sysext/reports/composer.json
index c2fd7d2aa58784bb3940c4dfdf0e5b92c7d84698..367908c20ae0a07b7676440b4a5ead49dff00f55 100644
--- a/typo3/sysext/reports/composer.json
+++ b/typo3/sysext/reports/composer.json
@@ -13,7 +13,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Determine system's status and send it via email"
@@ -23,7 +23,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/reports/ext_emconf.php b/typo3/sysext/reports/ext_emconf.php
index 76f593187673d313e4078a1b833e7dd93f9ae796..1b1f75a62e0e1c3a7cd10788df49a8f7c5f20167 100644
--- a/typo3/sysext/reports/ext_emconf.php
+++ b/typo3/sysext/reports/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [
diff --git a/typo3/sysext/rte_ckeditor/composer.json b/typo3/sysext/rte_ckeditor/composer.json
index b83fc22432f7126eb193351fdb038d807c87ce2f..895d76b241bb37ccb79662b2fac4996c6b178a56 100644
--- a/typo3/sysext/rte_ckeditor/composer.json
+++ b/typo3/sysext/rte_ckeditor/composer.json
@@ -13,7 +13,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -23,7 +23,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/rte_ckeditor/ext_emconf.php b/typo3/sysext/rte_ckeditor/ext_emconf.php
index 73321d1200a6833622e4e5ce5957bf6fb7f482fe..150f0c46d7286681fbe826f861f70f9132321d54 100644
--- a/typo3/sysext/rte_ckeditor/ext_emconf.php
+++ b/typo3/sysext/rte_ckeditor/ext_emconf.php
@@ -7,14 +7,14 @@ $EM_CONF[$_EXTKEY] = [
     'clearCacheOnLoad' => 0,
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [
-            'setup' => '10.3.0',
+            'setup' => '10.4.0',
         ],
     ],
 ];
diff --git a/typo3/sysext/scheduler/composer.json b/typo3/sysext/scheduler/composer.json
index caf2d289eb2f09802aaf11e2d3b0877061127c5a..4998de1433b0ccaa39e82965cfe017221f63fb4d 100644
--- a/typo3/sysext/scheduler/composer.json
+++ b/typo3/sysext/scheduler/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "scheduler"
diff --git a/typo3/sysext/scheduler/ext_emconf.php b/typo3/sysext/scheduler/ext_emconf.php
index 42bb242bf4fd06e890ac8e6728afbdbbcbf7404d..0b3b32dab83e6f280516fff7a880697c6ca768b2 100644
--- a/typo3/sysext/scheduler/ext_emconf.php
+++ b/typo3/sysext/scheduler/ext_emconf.php
@@ -3,7 +3,7 @@ $EM_CONF[$_EXTKEY] = [
     'title' => 'Scheduler',
     'description' => 'The TYPO3 Scheduler let\'s you register tasks to happen at a specific time',
     'category' => 'misc',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
     'author' => 'TYPO3 Core Team',
@@ -11,7 +11,7 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/seo/composer.json b/typo3/sysext/seo/composer.json
index 289dd83f190c0f5987f09abade93126121a8fe59..23d9c4df0ed616e95fd944ff5fe3db5c77b2866a 100644
--- a/typo3/sysext/seo/composer.json
+++ b/typo3/sysext/seo/composer.json
@@ -13,16 +13,16 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0",
-		"typo3/cms-frontend": "10.3.0",
-		"typo3/cms-extbase": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev",
+		"typo3/cms-frontend": "10.4.*@dev",
+		"typo3/cms-extbase": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "seo",
diff --git a/typo3/sysext/seo/ext_emconf.php b/typo3/sysext/seo/ext_emconf.php
index 80ad9e2fc0c52a8b69704f59e689f9a604c5df5d..43bbb12b20160e14ae9dcfd593f6d9841df43dca 100644
--- a/typo3/sysext/seo/ext_emconf.php
+++ b/typo3/sysext/seo/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 0,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0'
+            'typo3' => '10.4.0'
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/setup/composer.json b/typo3/sysext/setup/composer.json
index f86de40a1bd561f250ea95f6b9cfae672f7e9273..fb2bf3fd954eda5bcd6f3418907d71344087cc8d 100644
--- a/typo3/sysext/setup/composer.json
+++ b/typo3/sysext/setup/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/setup/ext_emconf.php b/typo3/sysext/setup/ext_emconf.php
index 6dd7339d60b0fd8af0acf5e00c6d662d4605cfb0..1b8d9998b4ea2bee19420bd50a17c9bd357ed28d 100644
--- a/typo3/sysext/setup/ext_emconf.php
+++ b/typo3/sysext/setup/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/sys_note/composer.json b/typo3/sysext/sys_note/composer.json
index dcf68b0180f2f4512e3c54e869a68e9b1778c1b1..d89ed67882e2ab42eead2cb37d06d2d363883899 100644
--- a/typo3/sysext/sys_note/composer.json
+++ b/typo3/sysext/sys_note/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/sys_note/ext_emconf.php b/typo3/sysext/sys_note/ext_emconf.php
index 3ebea68e2ef6be6bc54b8f4c458e2923b493a1d3..fd95a932bc500f4124422420ef9a58d05b8cffdf 100644
--- a/typo3/sysext/sys_note/ext_emconf.php
+++ b/typo3/sysext/sys_note/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/t3editor/composer.json b/typo3/sysext/t3editor/composer.json
index e630f1f487bf6946e963a2143f12ac33e86d9a50..0cc7e68037d35ad939944d91b6e65c9d2541ea46 100644
--- a/typo3/sysext/t3editor/composer.json
+++ b/typo3/sysext/t3editor/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/t3editor/ext_emconf.php b/typo3/sysext/t3editor/ext_emconf.php
index 0620f8428546c1568e0a1686b97079a64cb4be11..e388b013f9fd80762a269ae26e3b9161fb9eb6a4 100644
--- a/typo3/sysext/t3editor/ext_emconf.php
+++ b/typo3/sysext/t3editor/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/tstemplate/composer.json b/typo3/sysext/tstemplate/composer.json
index d1603b560fb03e4f3a112e9cbce6545482cd2183..dd2dfab5da1bdd89f0ca7687467afbf48af4fa43 100644
--- a/typo3/sysext/tstemplate/composer.json
+++ b/typo3/sysext/tstemplate/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/tstemplate/ext_emconf.php b/typo3/sysext/tstemplate/ext_emconf.php
index 45de9b24789bba4d7edb52bb8300ff0dfd01b727..434f0ef4f7cde479bcb56bef1fcce81b95e20e70 100644
--- a/typo3/sysext/tstemplate/ext_emconf.php
+++ b/typo3/sysext/tstemplate/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/viewpage/composer.json b/typo3/sysext/viewpage/composer.json
index 713a215cdfdff3d732141f27995ebd33e7c73e0b..2650c793b6b2c07b9d0b95837ca6732b0cc244a4 100644
--- a/typo3/sysext/viewpage/composer.json
+++ b/typo3/sysext/viewpage/composer.json
@@ -13,14 +13,14 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"Package": {
diff --git a/typo3/sysext/viewpage/ext_emconf.php b/typo3/sysext/viewpage/ext_emconf.php
index 3d9abfe1b3148b55c586cb112e406ed48fcc0ace..c7c10fcd5d150f58245727086100bbca6538a733 100644
--- a/typo3/sysext/viewpage/ext_emconf.php
+++ b/typo3/sysext/viewpage/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'TYPO3 Core Team',
     'author_email' => 'typo3cms@typo3.org',
     'author_company' => '',
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0',
+            'typo3' => '10.4.0',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/typo3/sysext/workspaces/composer.json b/typo3/sysext/workspaces/composer.json
index 9cd69e216dcd555b947675a02bd995c6ad60a9b0..4177241207df1ec956b6d4429c94ce1c84c25ad6 100644
--- a/typo3/sysext/workspaces/composer.json
+++ b/typo3/sysext/workspaces/composer.json
@@ -13,7 +13,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "10.3.0"
+		"typo3/cms-core": "10.4.*@dev"
 	},
 	"conflict": {
 		"typo3/cms": "*"
@@ -23,7 +23,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "10.3.x-dev"
+			"dev-master": "10.4.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "workspaces"
diff --git a/typo3/sysext/workspaces/ext_emconf.php b/typo3/sysext/workspaces/ext_emconf.php
index bac8bd3e8cf76b0aa8123818d19d05165bf2a19f..0238667c4a441fa258f8954f952f447eed33058f 100644
--- a/typo3/sysext/workspaces/ext_emconf.php
+++ b/typo3/sysext/workspaces/ext_emconf.php
@@ -8,10 +8,10 @@ $EM_CONF[$_EXTKEY] = [
     'author_company' => '',
     'state' => 'stable',
     'clearCacheOnLoad' => 1,
-    'version' => '10.3.0',
+    'version' => '10.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.3.0'
+            'typo3' => '10.4.0'
         ],
         'conflicts' => [],
         'suggests' => [],