diff --git a/algorithm-exercises-java/build.gradle b/algorithm-exercises-java/build.gradle
index 4c55d5c..5a8f9a4 100644
--- a/algorithm-exercises-java/build.gradle
+++ b/algorithm-exercises-java/build.gradle
@@ -54,7 +54,7 @@ tasks.named('test') {
 }
 
 checkstyle {
-    toolVersion = '13.8.0'
+    toolVersion = '13.9.0'
     configFile = file("${rootDir}/checkstyle.xml")
     maxErrors	= 0
     maxWarnings	= 0