diff --git a/composer.json b/composer.json
index 1688b78..21e1176 100644
--- a/composer.json
+++ b/composer.json
@@ -34,5 +34,10 @@
     "psr-4": {
       "EWZ\\Tests\\Bundle\\RecaptchaBundle\\": "tests"
     }
+  },
+  "extra": {
+    "symfony": {
+      "allow-contrib": "true"
+    }
   }
 }