diff --git a/composer.json b/composer.json
index a8b9d75..5be1dd8 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
     "type": "library",
     "keywords": ["deployment"],
     "require": {
-        "php": ">=5.3"
+        "php": ">=5.4"
     },
     "require-dev": {
         "phpunit/phpunit": "4.3.5",