diff --git a/requirements.txt b/requirements.txt
index 0ba5f30..37d60d0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ service-identity==16.0.0
 simplejson==3.9.0
 six==1.10.0
 Twisted==16.4.1
-urllib3==1.18
+urllib3==1.26.5
 virtualenv==15.0.3
 w3lib==1.15.0
 zope.interface==4.3.2
</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/wotrd/pythonstudy/pull/5.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/wotrd/pythonstudy/pull/5.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>