diff --git a/themes/vr/portal/portal.html b/themes/vr/portal/portal.html
index 9a58863..d3191bd 100755
--- a/themes/vr/portal/portal.html
+++ b/themes/vr/portal/portal.html
@@ -15,7 +15,7 @@
 	<link rel="stylesheet" type="text/css" href="{$tpl}css/layout.css">
 	<link rel="stylesheet" type="text/css" href="{$tpl}css/home.css">
 	<link rel="stylesheet" type="text/css" href="{$tpl}css/bootstrap.min.css">
-	<link rel="stylesheet" type="text/css" href="{$tpl}css/main.css">
+	<link rel="stylesheet" type="text/css" href="{$tpl}css/main.css?v=2023071101">
 	<script src="{$tpl}js/include.js?v=2020082701"></script>
 	<link href="https://fonts.googleapis.com/css?family=Noto+Sans+TC&display=swap" rel="stylesheet">
 	<link rel="stylesheet"