diff --git a/composer.json b/composer.json
index 5aa7750..5745822 100644
--- a/composer.json
+++ b/composer.json
@@ -53,7 +53,8 @@
         "bin-dir": "bin",
         "allow-plugins": {
             "ocramius/package-versions": true,
-            "symfony/flex": true
+            "symfony/flex": true,
+            "symfony/runtime": true
         },
         "preferred-install": {
           "chill-project/chill-bundles": "source",