diff --git a/scripts/pi-hole/php/header.php b/scripts/pi-hole/php/header.php
index 6c0a7ffb..d8154e2e 100644
--- a/scripts/pi-hole/php/header.php
+++ b/scripts/pi-hole/php/header.php
@@ -172,7 +172,7 @@
     }
 
 ?>
-<!DOCTYPE html>
+<!doctype html>
 <!-- Pi-hole: A black hole for Internet advertisements
 *  (c) 2017 Pi-hole, LLC (https://pi-hole.net)
 *  Network-wide ad blocking via your own hardware.
@@ -181,7 +181,7 @@
 *  Please see LICENSE file for your rights under this license. -->
 <html>
 <head>
-    <meta charset="UTF-8">
+    <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'">
     <title>Pi-hole Admin Console</title>
     <!-- Usually browsers proactively perform domain name resolution on links that the user may choose to follow. We disable DNS prefetching here -->
