diff --git a/static/timeslider.html b/static/timeslider.html
index 00a815b41..0f64c53aa 100644
--- a/static/timeslider.html
+++ b/static/timeslider.html
@@ -1,18 +1,16 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
-    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-
-<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
+<!doctype html>
+<html>
 <head>
-  <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
+  <meta charset="utf-8">
   <meta http-equiv="Content-Language" content="en-us" />
   <meta name="ROBOTS" content="NOINDEX, NOFOLLOW" />
 
   <title>Etherpad Lite Timeslider</title>
-  <link href="../../static/css/pad_lite.css" rel="stylesheet" type="text/css" />
-  <link href="../../static/css/timeslider.css" rel="stylesheet" type="text/css" />
+  <link href="../../static/css/pad_lite.css">
+  <link href="../../static/css/timeslider.css">
   <style type="text/css" title="dynamicsyntax"></style>
-  <script type="text/javascript" src="../../static/js/jquery.min.js"></script>
-  <script type="text/javascript">
+  <script src="../../static/js/jquery.min.js"></script>
+  <script>
 // <![CDATA[
   var clientVars = {};
 
