diff --git a/composer.json b/composer.json
index 34c9696..968bf09 100644
--- a/composer.json
+++ b/composer.json
@@ -16,6 +16,9 @@
     "sensio/framework-extra-bundle": "~2.2",
     "fzaninotto/faker": "dev-master"
   },
+  "conflict": {
+      "sensio/framework-extra-bundle": ">=2.4"
+  },
   "autoload": {
     "psr-0": { "Propel\\PropelBundle": "" }
   },