diff --git a/composer.json b/composer.json
index 475ad79d09878d0bec77a0f1e51b61537d0b11df..372e453a6431f7953c8a5e6b7d1c2c5902aba9e0 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
         "files": ["lib/_autoload_modules.php"]
     },
     "require": {
-        "php": ">=5.4",
+        "php": ">=5.5",
         "ext-SPL": "*",
         "ext-zlib": "*",
         "ext-pcre": "*",