diff --git a/index.html b/index.html
index 16daf93..960a148 100644
--- a/index.html
+++ b/index.html
@@ -1,6 +1,9 @@
+<!doctype html>
 <html>
 
 <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
     <script defer src="https://unpkg.com/alpinejs@3.x.x/dist/cdn.min.js"></script>
     <script src="https://unpkg.com/mqtt/dist/mqtt.min.js"></script>
     <script src="index.js"></script>
