diff --git a/composer.json b/composer.json
index af053454..cb00aa9e 100644
--- a/composer.json
+++ b/composer.json
@@ -5,6 +5,7 @@
     "license": "MIT",
     "type": "project",
     "require": {
+        "php": ">=5.5.9",
         "laravel/framework": "5.1.*"
     },
     "require-dev": {