diff --git a/java/case2geo/pom.xml b/java/case2geo/pom.xml
index c9262a5..5eaab8f 100644
--- a/java/case2geo/pom.xml
+++ b/java/case2geo/pom.xml
@@ -78,7 +78,7 @@
         </plugin>
         <plugin>
           <artifactId>maven-surefire-plugin</artifactId>
-          <version>3.5.5</version>
+          <version>3.5.6</version>
         </plugin>
         <plugin>
           <artifactId>maven-jar-plugin</artifactId>