diff --git a/pom.xml b/pom.xml
index a27323c..775b993 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
         <pmd-plugin.version>3.26.0</pmd-plugin.version>
         <pmd.version>7.8.0</pmd.version>
         <checkstyle-plugin.version>3.6.0</checkstyle-plugin.version>
-        <checkstyle.version>10.20.2</checkstyle.version>
+        <checkstyle.version>10.21.0</checkstyle.version>
 
         <!-- SonarCloud setup -->
         <sonar.projectKey>SvenWoltmann_sorting-algorithms-ultimate-guide</sonar.projectKey>