diff --git a/static/index.html b/static/index.html
index 0038dd1f5..11074ceb2 100644
--- a/static/index.html
+++ b/static/index.html
@@ -1,4 +1,4 @@
-<html>
+<DOCTYPE !html>
   <head>
     <title>Etherpad Lite</title>
     <style>
@@ -13,7 +13,7 @@
       }
       
       #wrapper {
-        margin:auto;
+        margin:0 auto;
         margin-top: 200px;
         width: 300px;
         height: 200px;
