diff --git a/composer.json b/composer.json
index 7b68cb9..2f077ed 100644
--- a/composer.json
+++ b/composer.json
@@ -23,6 +23,11 @@
   "require": {
     "ext-Zend-OPcache": "*",
     "php": ">=5.4"
+  },
+  "autoload": {
+    "psr-4" : {
+      "OpcacheGui\\" : "/"
+    }
   }
 }
 
diff --git a/index.php b/index.php
index e514177..a0743b8 100644
--- a/index.php
+++ b/index.php
@@ -1,5 +1,7 @@
 <?php
 
+namespace OpcacheGui;
+
 /**
  * OPcache GUI
  *