diff --git a/composer.json b/composer.json
index 0683999..ea19223 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,8 @@
     },
     "conflict": {
         "jms/serializer": "<0.12",
-        "jms/serializer-bundle": "<0.11"
+        "jms/serializer-bundle": "<0.11",
+        "twig/twig": "<1.12"
     },
     "require-dev": {
         "symfony/css-selector": "~2.3",