diff --git a/apps/deno-vless/src/deno/401.html b/apps/deno-vless/src/deno/401.html
index e7ab489..18e240a 100644
--- a/apps/deno-vless/src/deno/401.html
+++ b/apps/deno-vless/src/deno/401.html
@@ -10,7 +10,7 @@
 
 
 <body>
-    <h1>not set valid UUID in Environment Variables.</h1>
+    <h1 style="color: red;">Not set valid UUID in Environment Variables.</h1>
     <h2>Please use tool to generate UUID or use this one <span style="color: blue;" id="uuidSpan"></span></h2>
     <h3>Please refer to <a
             href="https://github.com/zizifn/edgetunnel/blob/main/doc/edge-tunnel-deno.md#%E6%B5%81%E7%A8%8B%E6%BC%94%E7%A4%BA">deno
