diff --git a/searx/templates/base.html b/searx/templates/base.html
index 848d3356..b5c124cf 100644
--- a/searx/templates/base.html
+++ b/searx/templates/base.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<!DOCTYPE html>
 <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
 <head>
     <meta http-equiv="content-type" content="text/html; charset=utf-8" />
