diff --git a/api_server/pom.xml b/api_server/pom.xml
index c8ab96b..b88a5a8 100644
--- a/api_server/pom.xml
+++ b/api_server/pom.xml
@@ -15,7 +15,7 @@
 
 <properties>
 <project.build.sourceencoding>UTF-8</project.build.sourceencoding>
- <spring.version>4.2.6.RELEASE</spring.version>
+ <spring.version>5.3.18</spring.version>
 </properties>
 
 <dependencies>
</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/HelloJavaWorld123/mvc/pull/17.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/HelloJavaWorld123/mvc/pull/17.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>