diff --git a/src/ninebadge-1.0/composer.json b/src/ninebadge-1.0/composer.json
index cc75a9b..8e4dd5b 100644
--- a/src/ninebadge-1.0/composer.json
+++ b/src/ninebadge-1.0/composer.json
@@ -68,7 +68,10 @@
         "preferred-install": {
             "*": "dist"
         },
-        "sort-packages": true
+        "sort-packages": true,
+        "allow-plugins": {
+            "symfony/flex": true
+        }
     },
     "autoload": {
         "psr-4": {