diff --git a/Chapter3-2-4/pom.xml b/Chapter3-2-4/pom.xml
index 766c2a3f..56c856ee 100644
--- a/Chapter3-2-4/pom.xml
+++ b/Chapter3-2-4/pom.xml
@@ -38,7 +38,7 @@
 		<dependency>
 			<groupid>mysql</groupid>
 			<artifactid>mysql-connector-java</artifactid>
-			<version>5.1.21</version>
+			<version>8.0.28</version>
 		</dependency>
 
 		<dependency>
</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/keepanote/SpringBoot-Learning/pull/106.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/keepanote/SpringBoot-Learning/pull/106.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>