diff --git a/jsyntrax/pom.xml b/jsyntrax/pom.xml
index 074f700..77ff7fd 100644
--- a/jsyntrax/pom.xml
+++ b/jsyntrax/pom.xml
@@ -52,7 +52,7 @@
         <approvaltests.version>9.5.0</approvaltests.version>
         <jacoco.maven.plugin.version>0.8.12</jacoco.maven.plugin.version>
         <checkstyle.maven.plugin.version>3.5.0</checkstyle.maven.plugin.version>
-        <checkstyle.version>10.18.1</checkstyle.version>
+        <checkstyle.version>10.20.1</checkstyle.version>
         <maven.source.plugin.version>3.3.1</maven.source.plugin.version>
         <maven.javadoc.plugin.version>3.10.0</maven.javadoc.plugin.version>
     </properties>