diff --git a/portal/header.ms b/portal/header.ms
index cc8169e..3ce820c 100644
--- a/portal/header.ms
+++ b/portal/header.ms
@@ -1,10 +1,11 @@
+<!DOCTYPE html>
 <html>
-<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" >
 <head>
+    <meta charset="utf-8">
     <meta name="format-detection" content="telephone=no" />
     <meta name="viewport" content="user-scalable=no, width=device-width, height=device-height" />
     <title>YunoHost Portal</title>
-    <link rel="stylesheet" href="assets/css/bootstrap.min.css" type="text/css"/>
+    <link rel="stylesheet" href="assets/css/bootstrap.min.css" type="text/css" />
     <script src="assets/js/jquery-1.10.2.min.js"></script>
 </head>
 <body>
