diff --git a/scripts/pi-hole/php/header.php b/scripts/pi-hole/php/header.php
index d4cd2ff8..0b1ab432 100644
--- a/scripts/pi-hole/php/header.php
+++ b/scripts/pi-hole/php/header.php
@@ -179,7 +179,7 @@
 *
 *  This file is copyright under the latest version of the EUPL.
 *  Please see LICENSE file for your rights under this license. -->
-<html>
+<html lang="en">
 <head>
     <meta charset="utf-8">
     <meta http-equiv="Content-Security-Policy" content="default-src 'self' https://api.github.com; script-src 'self' 'unsafe-eval'; style-src 'self' 'unsafe-inline'">
