diff --git a/composer.json b/composer.json
index aa95fa4..9e7d99d 100644
--- a/composer.json
+++ b/composer.json
@@ -55,5 +55,12 @@
         "jangregor/phpstan-prophecy": "^1.0",
         "phpstan/phpstan-phpunit": "^1.0",
         "guzzlehttp/guzzle": "^6.3 || ^7.3"
+    },
+    "config": {
+        "allow-plugins": {
+            "typo3/class-alias-loader": true,
+            "typo3/cms-composer-installers": true,
+            "phpstan/extension-installer": true
+        }
     }
 }