diff --git a/composer.json b/composer.json
index ae7849f..4d9c7bf 100644
--- a/composer.json
+++ b/composer.json
@@ -27,12 +27,12 @@
         }
     ],
     "require": {
-        "php": ">=5.4.0",
+        "php": ">=5.5.9",
         "illuminate/support": "5.1.*",
         "nikapps/ortc-php": "1.*"
     },
     "autoload": {
-        "psr-0": {
+        "psr-4": {
             "Nikapps\\OrtcLaravel\\": "src/"
         }
     },