diff --git a/samples/server/petstore/java-vertx/rx/pom.xml b/samples/server/petstore/java-vertx/rx/pom.xml
index 8e1a96f88ef..60a613333e3 100644
--- a/samples/server/petstore/java-vertx/rx/pom.xml
+++ b/samples/server/petstore/java-vertx/rx/pom.xml
@@ -17,7 +17,7 @@
 		<maven-compiler-plugin.version>3.3</maven-compiler-plugin.version>
 		<vertx-swagger-router.version>1.2.0</vertx-swagger-router.version>
 		<maven-shade-plugin.version>2.3</maven-shade-plugin.version>
-		<jackson-datatype-jsr310.version>2.7.4</jackson-datatype-jsr310.version>
+		<jackson-datatype-jsr310.version>2.9.0</jackson-datatype-jsr310.version>
 	</properties>
 
 	<dependencies>
@@ -72,15 +72,14 @@
 						</goals>
 						<configuration>
 							<transformers>
-								<transformer
-									implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+								<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
 									<manifestEntries>
 										<Main-Class>io.vertx.core.Starter</Main-Class>
 										<Main-Verticle>io.swagger.server.api.MainApiVerticle</Main-Verticle>
 									</manifestEntries>
 								</transformer>
 							</transformers>
-							<artifactSet />
+							<artifactSet/>
 							<outputFile>${project.build.directory}/${project.artifactId}-${project.version}-fat.jar</outputFile>
 						</configuration>
 					</execution>