diff --git a/templates/index.html b/templates/index.html
index 1ae31f1..41b2197 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -1,8 +1,9 @@
-<html>
+<!DOCTYPE html>
+<html lang="de">
     <head>
         <title>{{ title }}</title>
-        <link rel="stylesheet" type="text/css" href="/css/ab.css" />
-        <meta name="viewport" content="width=device-width,initial-scale=1" />
+        <link rel="stylesheet" type="text/css" href="/css/ab.css">
+        <meta name="viewport" content="width=device-width,initial-scale=1">
     </head>
     <body>
         <div id="content">
