diff --git a/templates/web/index.tt2.html b/templates/web/index.tt2.html
index 571c1a6782d3b19d9d03bd99fe597a9f9d9a8fa1..2596c4944d8796cd80184496136a259897bb0db2 100644
--- a/templates/web/index.tt2.html
+++ b/templates/web/index.tt2.html
@@ -1,4 +1,4 @@
-<DOCTYPE! html>
+<!doctype html>
<html lang="en">
<head>