diff --git a/examples/server/themes/mount-ai/index.html b/examples/server/themes/mount-ai/index.html
index 02dfdab08..981d9d594 100644
--- a/examples/server/themes/mount-ai/index.html
+++ b/examples/server/themes/mount-ai/index.html
@@ -1,5 +1,5 @@
+<!-- <!DOCTYPE html> -->
 <html>
-
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />
