diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 01df019ddcf..6b6347c1f1f 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -14,7 +14,7 @@ jobs:
     php:
         strategy:
             matrix:
-                php: ['7.4', '8.0', '8.1', '8.2']
+                php: ['7.4', '8.0', '8.1', '8.2', '8.3']
                 mysql: ['pkgs.mysql80']
         runs-on: ubuntu-latest
         steps:
diff --git a/UPGRADE-5.7.md b/UPGRADE-5.7.md
index d9b09206409..6483de47d8b 100644
--- a/UPGRADE-5.7.md
+++ b/UPGRADE-5.7.md
@@ -6,6 +6,11 @@ This changelog references changes done in Shopware 5.7 patch versions.
 
 [View all changes from v5.7.19...v5.7.20](https://github.com/shopware5/shopware/compare/v5.7.19...v5.7.20)
 
+### Additions
+
+* Added compatibility with PHP 8.3
+* Added new polyfill `symfony/polyfill-php83` to be able to use PHP 8.3 features
+
 ### Changes
 
 * Changed behaviour of the translation transfer while setting a product variant as the main variant
diff --git a/composer.json b/composer.json
index 3a5e8795a5d..c113e271f1b 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "issues": "https://issues.shopware.com"
     },
     "require": {
-        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0",
+        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0",
         "ext-ctype": "*",
         "ext-curl": "*",
         "ext-date": "*",
@@ -84,6 +84,7 @@
         "symfony/polyfill-php80": "^1.23",
         "symfony/polyfill-php81": "^1.23",
         "symfony/polyfill-php82": "^1.26",
+        "symfony/polyfill-php83": "^1.28",
         "symfony/process": "~4.4.34",
         "symfony/serializer": "~5.4.0",
         "symfony/validator": "~4.4.34",
diff --git a/composer.lock b/composer.lock
index d22096c5f46..f78c0951554 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": "1d25b5a3d868b27da86b27c330b6bf81",
+    "content-hash": "b0ea6c0efc0378d9808bdb6072617119",
     "packages": [
         {
             "name": "aws/aws-crt-php",
@@ -6169,6 +6169,86 @@
             ],
             "time": "2023-08-25T17:27:25+00:00"
         },
+        {
+            "name": "symfony/polyfill-php83",
+            "version": "v1.28.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php83.git",
+                "reference": "b0f46ebbeeeda3e9d2faebdfbf4b4eae9b59fa11"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php83/zipball/b0f46ebbeeeda3e9d2faebdfbf4b4eae9b59fa11",
+                "reference": "b0f46ebbeeeda3e9d2faebdfbf4b4eae9b59fa11",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1",
+                "symfony/polyfill-php80": "^1.14"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "1.28-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php83\\": ""
+                },
+                "classmap": [
+                    "Resources/stubs"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 8.3+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php83/tree/v1.28.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2023-08-16T06:22:46+00:00"
+        },
         {
             "name": "symfony/process",
             "version": "v4.4.44",
@@ -10528,7 +10608,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0",
+        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0",
         "ext-ctype": "*",
         "ext-curl": "*",
         "ext-date": "*",
diff --git a/recovery/common/composer.json b/recovery/common/composer.json
index c3bfab730d5..cd2632a4d6f 100644
--- a/recovery/common/composer.json
+++ b/recovery/common/composer.json
@@ -1,6 +1,6 @@
 {
     "require": {
-        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0",
+        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0",
         "knplabs/gaufrette": "0.11.1",
         "pimple/pimple": "3.5.0",
         "slim/slim": "2.6.3",
diff --git a/recovery/common/composer.lock b/recovery/common/composer.lock
index d3069143ba3..6d60879c133 100644
--- a/recovery/common/composer.lock
+++ b/recovery/common/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": "5e12e58996c7d623ea395eeaf95a1a88",
+    "content-hash": "c6ceb3b9ec9de94345bd1d0c524c235a",
     "packages": [
         {
             "name": "knplabs/gaufrette",
@@ -1381,7 +1381,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0"
+        "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0"
     },
     "platform-dev": [],
     "plugin-api-version": "2.3.0"