diff --git a/spring-boot-2-mqttserver/pom.xml b/spring-boot-2-mqttserver/pom.xml
index 31d8c9a..d40911f 100644
--- a/spring-boot-2-mqttserver/pom.xml
+++ b/spring-boot-2-mqttserver/pom.xml
@@ -22,7 +22,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.11</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>