diff --git a/requirements.txt b/requirements.txt
index 8784737..73856fd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ chardet==3.0.4
 docutils==0.16
 idna==3.7
 imagesize==1.2.0
-Jinja2==2.11.3
+Jinja2==3.1.4
 MarkupSafe==1.1.1
 packaging==20.4
 psutil==5.7.2
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/paulross/PythonExtensionPatterns/pull/30.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/paulross/PythonExtensionPatterns/pull/30.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>