diff --git a/theme/classic.php b/theme/classic.php
index 618ca01..072fd48 100644
--- a/theme/classic.php
+++ b/theme/classic.php
@@ -6,7 +6,8 @@
     <meta charset=utf-8>
     <meta http-equiv=X-UA-Compatible content="IE=edge">
     <meta name=viewport content="width=device-width,initial-scale=1">
-    <meta name="keywords" content="<?php echo $n_path;?>,<?php if ($p_path!='') echo $p_path.','; echo $_SERVER['sitename'];?>,OneManager,auth_by_逸笙">
+    <meta name="keywords" content="<?php echo $n_path;?>,<?php if ($p_path!='') echo $p_path.','; echo $_SERVER['sitename'];?>">
+    <meta name="description" content="<?php if ($_GET['preview']) echo 'Preview of '.$n_path; else echo 'List of '.$n_path; ?>. OneManager(An index & manager of Onedrive auth by ysun).">
     <link rel="icon" href="<?php echo $_SERVER['base_disk_path'];?>favicon.ico" type="image/x-icon" />
     <link rel="shortcut icon" href="<?php echo $_SERVER['base_disk_path'];?>favicon.ico" type="image/x-icon" />
     <style type="text/css">