diff --git a/composer.json b/composer.json
index 66f8f419..926bb508 100644
--- a/composer.json
+++ b/composer.json
@@ -71,7 +71,8 @@
             "composer/installers": true,
             "phpstan/extension-installer": true,
             "dealerdirect/phpcodesniffer-composer-installer": true,
-            "drupal/core-composer-scaffold": false
+            "drupal/core-composer-scaffold": false,
+            "symfony/runtime": false
         }
     }
 }