diff --git a/samples/16.proactive-messages/pom.xml b/samples/16.proactive-messages/pom.xml
index d72550c3a..3c5b28039 100644
--- a/samples/16.proactive-messages/pom.xml
+++ b/samples/16.proactive-messages/pom.xml
@@ -57,7 +57,7 @@
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
-        <version>4.12</version>
+        <version>4.13.1</version>
         <scope>test</scope>
       </dependency>