diff --git a/data/config.php b/data/config.php
index b7726e7..3e395a5 100755
--- a/data/config.php
+++ b/data/config.php
@@ -39,7 +39,7 @@ define('API_TIME', '2017-05-09 11:45:47');
 
 define('TOKEN_KEY','a49db4094e39246bebe51cc83ad47c15');
 
-define('MAIN_DOMAIN','builds.com.tw');
+define('MAIN_DOMAIN','www.builds.com.tw');
 
 define('MOBILE_REGISTER',false);
 
diff --git a/themes/vr/portal/portal.html b/themes/vr/portal/portal.html
index bb2d27d..60d6c8c 100755
--- a/themes/vr/portal/portal.html
+++ b/themes/vr/portal/portal.html
@@ -5,6 +5,8 @@
 <title>{$pt.name}｜{$pt.mtitle}</title>
 <meta name="description" content="{$pt.mdesc}">
 <meta name="keywords" content="{$pt.mkeyword}">
+<link rel="canonical" href="https://{$main_domain}/" />
+
 <script src="{$tpl}js/zln2mrk.js"></script>
 <script>try{Typekit.load({ async: true });}catch(e){}</script>
 <link rel="stylesheet" type="text/css" href="{$tpl}css/layout.css">