diff --git a/pom.xml b/pom.xml
index a2114b57..3f48e5fe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -54,7 +54,7 @@
 		<maven-eclipse-plugin.version>2.10</maven-eclipse-plugin.version>
 		<!-- for backwards compatibility, use maven-checkstyle-plugin.version -->
 		<checkstyle.version>${maven-checkstyle-plugin.version}</checkstyle.version>
-		<puppycrawl-tools-checkstyle.version>10.21.2</puppycrawl-tools-checkstyle.version>
+		<puppycrawl-tools-checkstyle.version>9.3</puppycrawl-tools-checkstyle.version>
 		<spring-javaformat.version>0.0.43</spring-javaformat.version>
 		<maven-failsafe-plugin.version>3.5.2</maven-failsafe-plugin.version>
 		<maven-javadoc-plugin.version>3.11.2</maven-javadoc-plugin.version>