diff --git a/pom.xml b/pom.xml
index 1d984bb..7cf8ab7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -40,7 +40,7 @@
     <takari.licenseHeader>https://raw.githubusercontent.com/takari/takari-pom/master/license-header-asl2.txt</takari.licenseHeader>
 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <mavenVersion>3.9.8</mavenVersion>
+    <mavenVersion>3.9.9</mavenVersion>
     <mavenResolverVersion>1.9.21</mavenResolverVersion>
     <pluginTestingVersion>3.0.3</pluginTestingVersion>
     <takari.javaSourceVersion>1.8</takari.javaSourceVersion>