diff --git a/samples/client/petstore/java/vertx/pom.xml b/samples/client/petstore/java/vertx/pom.xml
index 07d20c311d18..afde9c7aa52c 100644
--- a/samples/client/petstore/java/vertx/pom.xml
+++ b/samples/client/petstore/java/vertx/pom.xml
@@ -274,7 +274,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <vertx-version>3.4.2</vertx-version>
+        <vertx-version>3.9.0</vertx-version>
         <swagger-annotations-version>1.5.22</swagger-annotations-version>
         <jackson-version>2.10.5</jackson-version>
         <jackson-databind>2.10.5.1</jackson-databind>