diff --git a/pom.xml b/pom.xml
index 00e0b57..b309146 100644
--- a/pom.xml
+++ b/pom.xml
@@ -19,7 +19,7 @@
 <mysql-connector-java.version>6.0.6</mysql-connector-java.version>
 <mssql-jdbc.version>8.4.1.jre8</mssql-jdbc.version>
 <dom4j.version>2.1.3</dom4j.version>
- <spring-security-core.version>5.1.11.RELEASE</spring-security-core.version>
+ <spring-security-core.version>5.5.7</spring-security-core.version>
 <jaxen.version>1.1.6</jaxen.version>
 <saxpath.version>1.0-FCS</saxpath.version>
 <pinyin4j.version>2.5.1</pinyin4j.version>
</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/rememberber/WeSync/pull/15.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/rememberber/WeSync/pull/15.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>