diff --git a/composer.json b/composer.json
index ce89d4c0..08f742d8 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         }
     },
     "require": {
-        "php": ">=5.3.23",
+        "php": ">=5.5",
         "zendframework/zend-stdlib": "~2.5",
         "zendframework/zend-code": "~2.5"
     },
@@ -34,4 +34,4 @@
         "fabpot/php-cs-fixer": "1.7.*",
         "phpunit/PHPUnit": "~4.0"
     }
-}
\ No newline at end of file
+}