diff --git a/assertj-mail/pom.xml b/assertj-mail/pom.xml
index 4517675..b252efb 100644
--- a/assertj-mail/pom.xml
+++ b/assertj-mail/pom.xml
@@ -151,7 +151,7 @@
             <dependency>
               <groupId>com.puppycrawl.tools</groupId>
               <artifactId>checkstyle</artifactId>
-              <version>10.20.2</version>
+              <version>10.21.0</version>
             </dependency>
           </dependencies>
         </plugin>
diff --git a/pom.xml b/pom.xml
index 66e72e2..cba343d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -68,7 +68,7 @@
             <dependency>
               <groupId>com.puppycrawl.tools</groupId>
               <artifactId>checkstyle</artifactId>
-              <version>10.20.2</version>
+              <version>10.21.0</version>
             </dependency>
           </dependencies>
         </plugin>