diff --git a/composer.json b/composer.json
index b07d6db00b998ed816af78331a82d2ae652a57ec..6ed7a8f95df6dfe4e45882c38c422862ad0d7b1f 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,12 @@
 		"platform": {
 			"php": "7.4.1"
 		},
-		"sort-packages": true
+		"sort-packages": true,
+		"allow-plugins": {
+			"composer/package-versions-deprecated": true,
+			"typo3/class-alias-loader": true,
+			"typo3/cms-composer-installers": true
+		}
 	},
 	"require": {
 		"php": "^7.4 || ^8.0",