diff --git a/version.php b/version.php
index c3a264b..f2a730a 100644
--- a/version.php
+++ b/version.php
@@ -1,5 +1,4 @@
 <?php
-
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify
@@ -24,6 +23,9 @@
  * @copyright  	@2018 PlagScan GmbH
  * @license    	http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
+
+defined('MOODLE_INTERNAL') || die();
+
 $plugin->version = 2021110302;
 $plugin->requires = 2019101000;
 $plugin->cron = 60;