diff --git a/composer.json b/composer.json
index 570189b..a73c319 100644
--- a/composer.json
+++ b/composer.json
@@ -8,6 +8,9 @@
             "email": "emsifa@gmail.com"
         }
     ],
+    "require": {
+        "php": ">=5.4.0"
+    },
     "autoload": {
         "psr-4": {
             "Rakit\\Session\\": ""