diff --git a/composer.json b/composer.json
index ec192147e1..f19f8509f0 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
         {"name": "Michael Simonson", "email": "contact@mikesimonson.com" }
     ],
     "require": {
-        "php": ">=5.4.0",
+        "php": "^5.5|^7.0",
         "doctrine/dbal": "~2.2",
         "symfony/yaml": "~2.3|~3.0",
         "symfony/console": "~2.3|~3.0"