diff --git a/requirements-development.txt b/requirements-development.txt
index 80f778a0..55340b41 100644
--- a/requirements-development.txt
+++ b/requirements-development.txt
@@ -13,6 +13,6 @@ pytest-cov==2.6.1
 pytest-django==3.4.7
 pytest-factoryboy==2.0.2
 recommonmark==0.5.0
-Sphinx==1.8.3
+Sphinx==1.8.4
 sphinx_rtd_theme==0.4.2
 twine==1.12.1
</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/django-json-api/django-rest-framework-json-api/pull/571.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/django-json-api/django-rest-framework-json-api/pull/571.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>