diff --git a/opcache.php b/opcache.php
index 22b4b2f..ac73049 100644
--- a/opcache.php
+++ b/opcache.php
@@ -2,6 +2,8 @@
 
 define('THOUSAND_SEPARATOR',true);
 
+/** @source https://raw.githubusercontent.com/rlerdorf/opcache-status/master/opcache.php */
+
 if (!extension_loaded('Zend OPcache')) {
     echo '<div style="background-color: #F2DEDE; color: #B94A48; padding: 1em;">You do not have the Zend OPcache extension loaded, sample data is being shown instead.</div>';
     require 'data-sample.php';