diff --git a/loop/webui/playwright/index.html b/loop/webui/playwright/index.html
index 000deea..56da040 100644
--- a/loop/webui/playwright/index.html
+++ b/loop/webui/playwright/index.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html>
+<!doctype html>
 <html lang="en">
   <head>
     <meta charset="UTF-8" />