diff --git a/modules/openapi-generator/src/main/resources/JavaVertXServer/pom.mustache b/modules/openapi-generator/src/main/resources/JavaVertXServer/pom.mustache
index 4c76c2f6206..939494cec7a 100644
--- a/modules/openapi-generator/src/main/resources/JavaVertXServer/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/JavaVertXServer/pom.mustache
@@ -7,7 +7,7 @@
     <version>{{artifactVersion}}</version>
     <packaging>jar</packaging>
 
-      <name>{{appName}}</name>
+    <name>{{appName}}</name>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/modules/openapi-generator/src/main/resources/JavaVertXWebServer/supportFiles/pom.mustache b/modules/openapi-generator/src/main/resources/JavaVertXWebServer/supportFiles/pom.mustache
index da3bb233cf8..0d7bb4c6f08 100644
--- a/modules/openapi-generator/src/main/resources/JavaVertXWebServer/supportFiles/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/JavaVertXWebServer/supportFiles/pom.mustache
@@ -17,7 +17,7 @@
         <maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version>
         <exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
 
-        <vertx.version>4.0.0</vertx.version>
+        <vertx.version>4.2.4</vertx.version>
         <junit-jupiter.version>5.7.0</junit-jupiter.version>
         <slf4j.version>1.7.30</slf4j.version>
         <jackson.version>2.11.2</jackson.version>
diff --git a/samples/server/petstore/java-vertx-web/pom.xml b/samples/server/petstore/java-vertx-web/pom.xml
index 56eebc06b10..10e3649bd89 100644
--- a/samples/server/petstore/java-vertx-web/pom.xml
+++ b/samples/server/petstore/java-vertx-web/pom.xml
@@ -17,7 +17,7 @@
         <maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version>
         <exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
 
-        <vertx.version>4.0.0</vertx.version>
+        <vertx.version>4.2.4</vertx.version>
         <junit-jupiter.version>5.7.0</junit-jupiter.version>
         <slf4j.version>1.7.30</slf4j.version>
         <jackson.version>2.11.2</jackson.version>
diff --git a/samples/server/petstore/java-vertx-web/src/main/java/org/openapitools/vertxweb/server/api/PetApiImpl.java b/samples/server/petstore/java-vertx-web/src/main/java/org/openapitools/vertxweb/server/api/PetApiImpl.java
index c3daaf53230..8743965e08a 100644
--- a/samples/server/petstore/java-vertx-web/src/main/java/org/openapitools/vertxweb/server/api/PetApiImpl.java
+++ b/samples/server/petstore/java-vertx-web/src/main/java/org/openapitools/vertxweb/server/api/PetApiImpl.java
@@ -44,7 +44,7 @@ public class PetApiImpl implements PetApi {
         return Future.failedFuture(new HttpException(501));
     }
 
-    public Future<ApiResponse<ModelApiResponse>> uploadFile(Long petId, FileUpload file) {
+    public Future<ApiResponse<ModelApiResponse>> uploadFile(Long petId, FileUpload _file) {
         return Future.failedFuture(new HttpException(501));
     }
 
diff --git a/samples/server/petstore/java-vertx-web/src/main/java/org/openapitools/vertxweb/server/api/UserApiImpl.java b/samples/server/petstore/java-vertx-web/src/main/java/org/openapitools/vertxweb/server/api/UserApiImpl.java
index 48324ba8ee0..414f22e0de2 100644
--- a/samples/server/petstore/java-vertx-web/src/main/java/org/openapitools/vertxweb/server/api/UserApiImpl.java
+++ b/samples/server/petstore/java-vertx-web/src/main/java/org/openapitools/vertxweb/server/api/UserApiImpl.java
@@ -1,5 +1,6 @@
 package org.openapitools.vertxweb.server.api;
 
+import java.time.OffsetDateTime;
 import org.openapitools.vertxweb.server.model.User;
 
 import org.openapitools.vertxweb.server.ApiResponse;