diff --git a/.config/pmd/java/ruleset.xml b/.config/pmd/java/ruleset.xml
index 6bf58b3..4570323 100644
--- a/.config/pmd/java/ruleset.xml
+++ b/.config/pmd/java/ruleset.xml
@@ -204,7 +204,7 @@
 
 	<rule name="AvoidStringBuilderOrBuffer"
 		language="java"
-		message="StringBuilder/ should not be used"
+		message="StringBuilder/StringBuffer should not be used"
 		class="net.sourceforge.pmd.lang.rule.xpath.XPathRule">
 		<description>
 			Usually all cases where `StringBuilder` (or the outdated `StringBuffer`) is used are either due to confusing (legacy) logic or may be replaced by a simpler string concatenation.
diff --git a/pom.xml b/pom.xml
index 3053e48..722f593 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,7 +45,7 @@
 							<dependency>
 								<groupId>com.puppycrawl.tools</groupId>
 								<artifactId>checkstyle</artifactId>
-								<version>11.1.0</version>
+								<version>12.0.0</version>
 							</dependency>
 						</dependencies>
 						<configuration>
diff --git a/sessionize-java-client/pom.xml b/sessionize-java-client/pom.xml
index cea14f1..8f72ee0 100644
--- a/sessionize-java-client/pom.xml
+++ b/sessionize-java-client/pom.xml
@@ -449,7 +449,7 @@
 							<dependency>
 								<groupId>com.puppycrawl.tools</groupId>
 								<artifactId>checkstyle</artifactId>
-								<version>11.1.0</version>
+								<version>12.0.0</version>
 							</dependency>
 						</dependencies>
 						<configuration>