diff --git a/composer.json b/composer.json
index b02e16dff4..a2157ab412 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         "psr-0": { "": "src/" }
     },
     "require": {
-        "php": ">=5.4.4",
+        "php": "~5.5|~7.0",
         "symfony/symfony": "~2.7.0",
         "twig/extensions": "~1.0",
         "symfony/assetic-bundle": "~2.3",