diff --git a/README.md b/README.md
index a737961..8ba9793 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ The power of **Composer** and **MVC** in your **Wordpress** plugins.
 
 ## Requirements
 
-* PHP >= 5.3.0
+* PHP >= 5.4.0
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index bd42ffc..57c02ac 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=5.3.0",
+        "php": ">=5.4.0",
         "amostajo/wordpress-plugin-core": "1.0.*"
     },
     "autoload": {