diff --git a/composer.json b/composer.json
index 8822793..bb1240a 100644
--- a/composer.json
+++ b/composer.json
@@ -15,8 +15,8 @@
         }
     ],
     "require":{
-        "php":">=5.5",
-        "contao/core-bundle":"^4.1",
+        "php": "^5.6 || ^7.0",
+        "contao/core-bundle": "^4.4",
         "doctrine/dbal": "^2.5"
     },
     "require-dev": {