diff --git a/composer.json b/composer.json
index f827e18..1dab4ff 100644
--- a/composer.json
+++ b/composer.json
@@ -6,6 +6,10 @@
 	"description" : "TYPO3 CMS Base Distribution",
 	"license": "GPL-2.0-or-later",
 	"config": {
+		"allow-plugins": {
+			"typo3/class-alias-loader": true,
+			"typo3/cms-composer-installers": true
+		},
 		"platform": {
 			"php": "7.2"
 		}