diff --git a/samples/server/petstore/kotlin/vertx/.openapi-generator/FILES b/samples/server/petstore/kotlin/vertx/.openapi-generator/FILES
index cf01966a4dda..bfa6fd2a60ca 100644
--- a/samples/server/petstore/kotlin/vertx/.openapi-generator/FILES
+++ b/samples/server/petstore/kotlin/vertx/.openapi-generator/FILES
@@ -1,7 +1,7 @@
 README.md
 pom.xml
-src/main/kotlin/org/openapitools/server/api/model/ApiResponse.kt
 src/main/kotlin/org/openapitools/server/api/model/Category.kt
+src/main/kotlin/org/openapitools/server/api/model/ModelApiResponse.kt
 src/main/kotlin/org/openapitools/server/api/model/Order.kt
 src/main/kotlin/org/openapitools/server/api/model/Pet.kt
 src/main/kotlin/org/openapitools/server/api/model/Tag.kt
diff --git a/samples/server/petstore/kotlin/vertx/README.md b/samples/server/petstore/kotlin/vertx/README.md
index 4e9992d66cbf..47e035f66db9 100644
--- a/samples/server/petstore/kotlin/vertx/README.md
+++ b/samples/server/petstore/kotlin/vertx/README.md
@@ -51,8 +51,8 @@ This runs all tests and packages the library.
     <a name="documentation-for-models"></a>
     ## Documentation for Models
 
-         - [org.openapitools.server.api.model.ApiResponse](docs/ApiResponse.md)
          - [org.openapitools.server.api.model.Category](docs/Category.md)
+         - [org.openapitools.server.api.model.ModelApiResponse](docs/ModelApiResponse.md)
          - [org.openapitools.server.api.model.Order](docs/Order.md)
          - [org.openapitools.server.api.model.Pet](docs/Pet.md)
          - [org.openapitools.server.api.model.Tag](docs/Tag.md)
diff --git a/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/model/ModelApiResponse.kt b/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/model/ModelApiResponse.kt
new file mode 100644
index 000000000000..ce8326960332
--- /dev/null
+++ b/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/model/ModelApiResponse.kt
@@ -0,0 +1,34 @@
+/**
+* OpenAPI Petstore
+* This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+*
+* The version of the OpenAPI document: 1.0.0
+* 
+*
+* NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+* https://openapi-generator.tech
+* Do not edit the class manually.
+*/
+package org.openapitools.server.api.model
+
+
+        
+import com.google.gson.annotations.SerializedName
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties
+import com.fasterxml.jackson.annotation.JsonInclude
+/**
+ * Describes the result of uploading an image resource
+ * @param code 
+ * @param type 
+ * @param message 
+ */
+@JsonInclude(JsonInclude.Include.NON_NULL)
+@JsonIgnoreProperties(ignoreUnknown = true)
+data class ModelApiResponse (
+    var code: kotlin.Int? = null,
+    var type: kotlin.String? = null,
+    var message: kotlin.String? = null
+) {
+
+}
+
diff --git a/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/verticle/PetApi.kt b/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/verticle/PetApi.kt
index 07f92471774c..5968aa12cac2 100644
--- a/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/verticle/PetApi.kt
+++ b/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/verticle/PetApi.kt
@@ -1,6 +1,6 @@
 package org.openapitools.server.api.verticle
 
-import org.openapitools.server.api.model.ApiResponse
+import org.openapitools.server.api.model.ModelApiResponse
 import org.openapitools.server.api.model.Pet
 import io.vertx.core.Vertx
 import io.vertx.core.json.JsonObject
@@ -41,7 +41,7 @@ interface PetApi  {
     suspend fun updatePetWithForm(petId:kotlin.Long?,name:kotlin.String?,status:kotlin.String?,context:OperationRequest):Response<Void>
     /* uploadFile
      * uploads an image */
-    suspend fun uploadFile(petId:kotlin.Long?,additionalMetadata:kotlin.String?,file:kotlin.collections.List<java.io.File>?,context:OperationRequest):Response<ApiResponse>
+    suspend fun uploadFile(petId:kotlin.Long?,additionalMetadata:kotlin.String?,file:kotlin.collections.List<java.io.File>?,context:OperationRequest):Response<ModelApiResponse>
     companion object {
         const val address = "PetApi-service"
         suspend fun createRouterFactory(vertx: Vertx,path:String): io.vertx.ext.web.api.contract.openapi3.OpenAPI3RouterFactory {
diff --git a/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/verticle/PetApiVertxProxyHandler.kt b/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/verticle/PetApiVertxProxyHandler.kt
index 6d4fcafa98bc..644fc1cee83a 100644
--- a/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/verticle/PetApiVertxProxyHandler.kt
+++ b/samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/verticle/PetApiVertxProxyHandler.kt
@@ -16,7 +16,7 @@ import io.vertx.core.json.Json
 import io.vertx.core.json.JsonArray
 import com.google.gson.reflect.TypeToken
 import com.google.gson.Gson
-import org.openapitools.server.api.model.ApiResponse
+import org.openapitools.server.api.model.ModelApiResponse
 import org.openapitools.server.api.model.Pet
 
 class PetApiVertxProxyHandler(private val vertx: Vertx, private val service: PetApi, topLevel: Boolean, private val timeoutSeconds: Long) : ProxyHandler() {