diff --git a/composer.json b/composer.json
index 6c20a6e..5a15849 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
   "description": "Console classes for shell commands and scripts",
   "license": "MIT",
   "require": {
-    "php": ">=5.3"
+    "php": ">=5.5"
   },
   "autoload": {
     "psr-4": {