diff --git a/data/index.html b/data/index.html
index 6c818e6..84fb4e5 100644
--- a/data/index.html
+++ b/data/index.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <html>
-
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <head>
   <title>ESP8266 Treppenlicht</title>
   <link href="/favicon.png" rel="icon" type="image/png" sizes="10x10">
