diff --git a/composer.json b/composer.json
index cd76787..44d2d19 100644
--- a/composer.json
+++ b/composer.json
@@ -1,12 +1,34 @@
 {
     "name": "digicomp/flow-symfony-bridge-messenger",
-    "type": "neos-package",
     "description": "Flow dependency injection bridge to symfony/messenger",
+    "type": "neos-package",
+    "keywords": [
+        "Neos",
+        "Flow",
+        "symfony",
+        "messenger"
+    ],
+    "homepage": "https://github.com/digital-competence/DigiComp.FlowSymfonyBridge.Messenger",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Ferdinand Kuhl",
+            "email": "f.kuhl@digital-competence.de",
+            "homepage": "https://www.digital-competence.de",
+            "role": "Developer"
+        }
+    ],
     "require": {
-        "php": "^8.1",
-        "neos/flow": "^8.0",
-        "symfony/doctrine-messenger": "^6.2",
-        "symfony/event-dispatcher": "^4.2 | ^5.2 | ^6.2"
+        "php": ">=8.1",
+        "neos/flow": "^8.0.0",
+        "symfony/doctrine-messenger": "^6.2.0",
+        "symfony/event-dispatcher": "^4.2.0 || ^5.2.0 || ^6.2.0"
+    },
+    "require-dev": {
+        "mikey179/vfsstream": "^1.6.1",
+        "neos/buildessentials": "^7.0.0",
+        "phpunit/phpunit": "~8.5",
+        "vimeo/psalm": "~4.22.0"
     },
     "autoload": {
         "psr-4": {
@@ -18,6 +40,10 @@
             "DigiComp\\FlowSymfonyBridge\\Messenger\\Tests\\": "Tests/"
         }
     },
+    "config": {
+        "sort-packages": true,
+        "platform-check": true
+    },
     "extra": {
         "branch-alias": {
             "dev-master": "0.1.x-dev"
@@ -25,21 +51,5 @@
         "neos": {
             "package-key": "DigiComp.FlowSymfonyBridge.Messenger"
         }
-    },
-    "authors": [
-        {
-            "name": "Ferdinand Kuhl",
-            "email": "f.kuhl@digital-competence.de",
-            "homepage": "https://www.digital-competence.de",
-            "role": "Developer"
-        }
-    ],
-    "license": "MIT",
-    "homepage": "https://github.com/digital-competence/DigiComp.FlowSymfonyBridge.Messenger",
-    "keywords": [
-        "Neos",
-        "Flow",
-        "symfony",
-        "messenger"
-    ]
+    }
 }