diff --git a/pom.xml b/pom.xml
index a5df54d..d262143 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@
     <pmd-plugin.version>3.26.0</pmd-plugin.version>
     <pmd.version>7.11.0</pmd.version>
     <checkstyle-plugin.version>3.6.0</checkstyle-plugin.version>
-    <checkstyle.version>10.21.3</checkstyle.version>
+    <checkstyle.version>10.21.4</checkstyle.version>
 
     <!-- SonarCloud setup -->
     <sonar.projectKey>SvenWoltmann_java-collections-guide</sonar.projectKey>