diff --git a/web/app/controllers/problem_list.php b/web/app/controllers/problem_list.php
index 7176138..c47e8b6 100644
--- a/web/app/controllers/problem_list.php
+++ b/web/app/controllers/problem_list.php
@@ -114,6 +114,9 @@ EOD;
 <div class="d-flex justify-content-between">
 <?php endif ?>
 <h1 class="h2">
+	<?php if ($list['is_hidden']): ?>
+	<span class="fs-5 text-danger">[隐藏]</span>
+	<?php endif ?>
 	<?= $list['title'] ?>
 	<span class="fs-5">(ID: #<?= $list['id'] ?>)</span>
 </h1>