diff --git a/plc4j/examples/hello-connectivity-mqtt/pom.xml b/plc4j/examples/hello-connectivity-mqtt/pom.xml
index 1670e37e7e3..d32759f991c 100644
--- a/plc4j/examples/hello-connectivity-mqtt/pom.xml
+++ b/plc4j/examples/hello-connectivity-mqtt/pom.xml
@@ -50,7 +50,7 @@
     <dependency>
       <groupId>io.reactivex.rxjava2</groupId>
       <artifactId>rxjava</artifactId>
-      <version>2.1.12</version>
+      <version>2.2.21</version>
     </dependency>
 
     <dependency>