diff --git a/composer.json b/composer.json
index 9391f0d..c010a12 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
         }
     ],
     "require": {
-        "php": ">=5.2.0"
+        "php": ">=5.3.0"
     },
     "autoload": {
         "classmap": ["SendyPHP.php"]