diff --git a/app-4-rxtx-qbang/pom.xml b/app-4-rxtx-qbang/pom.xml
index 4cb5d19..d8b7c8a 100644
--- a/app-4-rxtx-qbang/pom.xml
+++ b/app-4-rxtx-qbang/pom.xml
@@ -93,7 +93,7 @@
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
             <scope>test</scope>
-            <version>4.8.1</version>
+            <version>4.13.1</version>
         </dependency>
 
     </dependencies>