diff --git a/composer.json b/composer.json
index f8afee10c5bca26792824d69bff00bfe3ae18419..51dd7a92c4ee9e542b3429e6864c9d9430378490 100644
--- a/composer.json
+++ b/composer.json
@@ -47,6 +47,7 @@
 		"doctrine/lexer": "^1.2.1",
 		"egulias/email-validator": "^2.1",
 		"guzzlehttp/guzzle": "^7.2",
+		"guzzlehttp/psr7": "^1.7.0",
 		"nikic/php-parser": "^4.10.4",
 		"phpdocumentor/reflection-docblock": "^5.2",
 		"phpdocumentor/type-resolver": "^1.4",
diff --git a/composer.lock b/composer.lock
index 3a8de3c9a60a0997b3d27ee812e884e0d094308c..5936dcf98381fd1a4a65d2bf7e3021081a937ecb 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": "63c454f6977e568f44a8f9b5e7a815ba",
+    "content-hash": "4cc6f8e7d9eff80f921541c99c4841e5",
     "packages": [
         {
             "name": "bacon/bacon-qr-code",
@@ -974,16 +974,16 @@
         },
         {
             "name": "guzzlehttp/psr7",
-            "version": "1.7.0",
+            "version": "1.8.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/psr7.git",
-                "reference": "53330f47520498c0ae1f61f7e2c90f55690c06a3"
+                "reference": "dc960a912984efb74d0a90222870c72c87f10c91"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/psr7/zipball/53330f47520498c0ae1f61f7e2c90f55690c06a3",
-                "reference": "53330f47520498c0ae1f61f7e2c90f55690c06a3",
+                "url": "https://api.github.com/repos/guzzle/psr7/zipball/dc960a912984efb74d0a90222870c72c87f10c91",
+                "reference": "dc960a912984efb74d0a90222870c72c87f10c91",
                 "shasum": ""
             },
             "require": {
@@ -1043,9 +1043,9 @@
             ],
             "support": {
                 "issues": "https://github.com/guzzle/psr7/issues",
-                "source": "https://github.com/guzzle/psr7/tree/1.7.0"
+                "source": "https://github.com/guzzle/psr7/tree/1.8.2"
             },
-            "time": "2020-09-30T07:37:11+00:00"
+            "time": "2021-04-26T09:17:50+00:00"
         },
         {
             "name": "nikic/php-parser",
diff --git a/typo3/sysext/core/composer.json b/typo3/sysext/core/composer.json
index 2c72a6631c3f9e559df5d65a9ba7e6b2371185bd..466d261fdd3ebfc20ffda05e3c475f2333fe4f57 100644
--- a/typo3/sysext/core/composer.json
+++ b/typo3/sysext/core/composer.json
@@ -35,6 +35,7 @@
 		"doctrine/lexer": "^1.2.1",
 		"egulias/email-validator": "^2.1",
 		"guzzlehttp/guzzle": "^7.2",
+		"guzzlehttp/psr7": "^1.7.0",
 		"nikic/php-parser": "^4.10.4",
 		"psr/container": "^1.1 || ^2.0",
 		"psr/event-dispatcher": "^1.0",