diff --git a/composer.json b/composer.json
index a62a477..0afa059 100644
--- a/composer.json
+++ b/composer.json
@@ -17,10 +17,13 @@
 	],
     "autoload": {
         "psr-0": {
-			"Canteen\\HTML5\\" : "src/"
+			"Canteen\\HTML5" : "src"
 		},
 		"files": ["src/html.php"]
     },
+	"require": {
+		"php": ">=5.3.0"
+	},
 	"minimum-stability": "stable",
 	"repositories": [
 		{