diff --git a/core/loader.php b/core/loader.php
index 7b9fc0b..501ea74 100644
--- a/core/loader.php
+++ b/core/loader.php
@@ -7,6 +7,9 @@
 // Set the php coockie id only visible over http
 ini_set('session.cookie_httponly', true);
 
+// Prevent Loading iframe to other website
+header("X-Frame-Options: DENY");
+
 // Check if the PHP version is at leat 7.0
 if( version_compare(PHP_VERSION, '7.0.0') <= 0 ) {
     header('HTTP/1.0 403 Forbidden');