diff --git a/server/dockerconfs/Dockerfile-common-normal b/server/dockerconfs/Dockerfile-common-normal
index 468ca6243..5ae80258b 100644
--- a/server/dockerconfs/Dockerfile-common-normal
+++ b/server/dockerconfs/Dockerfile-common-normal
@@ -1,4 +1,4 @@
-FROM python:3.7.12-slim
+FROM python:3.13.0a2-slim
 
 ARG EXTRA_TOOLS="gnupg curl wget jq vim-tiny net-tools procps python3-dev default-libmysqlclient-dev locales inotify-tools gcc subversion git telnet iputils-ping vim openssh-client"
 
</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/ddzzj/CodeAnalysis/pull/33.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/ddzzj/CodeAnalysis/pull/33.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>