diff --git a/bin/utils/ensure-up-to-date b/bin/utils/ensure-up-to-date
index bb2bf5a660..fd2020347d 100755
--- a/bin/utils/ensure-up-to-date
+++ b/bin/utils/ensure-up-to-date
@@ -35,6 +35,7 @@ declare -a scripts=(
 "./bin/php-slim-server-petstore.sh"
 "./bin/php-ze-ph-petstore-server.sh"
 "./bin/openapi3/php-petstore.sh"
+"./bin/typescript-angularjs-petstore.sh"
 "./bin/typescript-angular-petstore-all.sh"
 "./bin/typescript-aurelia-petstore.sh"
 "./bin/typescript-axios-petstore-all.sh"
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptAngularJsClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptAngularJsClientCodegen.java
index c51c1d89b1..7621cbe370 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptAngularJsClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptAngularJsClientCodegen.java
@@ -74,7 +74,7 @@ public class TypeScriptAngularJsClientCodegen extends AbstractTypeScriptClientCo
     @Override
     public void postProcessParameter(CodegenParameter parameter) {
         super.postProcessParameter(parameter);
-        parameter.dataType = addModelPrefix(parameter.dataType);
+        // parameter.dataType = addModelPrefix(parameter.dataType);
     }
 
     private String getIndexDirectory() {
diff --git a/samples/client/petstore/typescript-angularjs/.openapi-generator/VERSION b/samples/client/petstore/typescript-angularjs/.openapi-generator/VERSION
index 6d94c9c2e1..afa6365606 100644
--- a/samples/client/petstore/typescript-angularjs/.openapi-generator/VERSION
+++ b/samples/client/petstore/typescript-angularjs/.openapi-generator/VERSION
@@ -1 +1 @@
-3.3.0-SNAPSHOT
\ No newline at end of file
+4.0.0-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore/typescript-angularjs/api/PetApi.ts b/samples/client/petstore/typescript-angularjs/api/PetApi.ts
index 841d482e31..6b03c0f45f 100644
--- a/samples/client/petstore/typescript-angularjs/api/PetApi.ts
+++ b/samples/client/petstore/typescript-angularjs/api/PetApi.ts
@@ -29,22 +29,22 @@ export class PetApi {
     /**
      * 
      * @summary Add a new pet to the store
-     * @param pet Pet object that needs to be added to the store
+     * @param body Pet object that needs to be added to the store
      */
-    public addPet (pet: models.models.Pet, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
+    public addPet (body: models.Pet, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
         const localVarPath = this.basePath + '/pet';
 
         let queryParameters: any = {};
         let headerParams: any = (<any>Object).assign({}, this.defaultHeaders);
-        // verify required parameter 'pet' is not null or undefined
-        if (pet === null || pet === undefined) {
-            throw new Error('Required parameter pet was null or undefined when calling addPet.');
+        // verify required parameter 'body' is not null or undefined
+        if (body === null || body === undefined) {
+            throw new Error('Required parameter body was null or undefined when calling addPet.');
         }
 
         let httpRequestParams: ng.IRequestConfig = {
             method: 'POST',
             url: localVarPath,
-            data: pet,
+            data: body,
             params: queryParameters,
             headers: headerParams
         };
@@ -183,22 +183,22 @@ export class PetApi {
     /**
      * 
      * @summary Update an existing pet
-     * @param pet Pet object that needs to be added to the store
+     * @param body Pet object that needs to be added to the store
      */
-    public updatePet (pet: models.models.Pet, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
+    public updatePet (body: models.Pet, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
         const localVarPath = this.basePath + '/pet';
 
         let queryParameters: any = {};
         let headerParams: any = (<any>Object).assign({}, this.defaultHeaders);
-        // verify required parameter 'pet' is not null or undefined
-        if (pet === null || pet === undefined) {
-            throw new Error('Required parameter pet was null or undefined when calling updatePet.');
+        // verify required parameter 'body' is not null or undefined
+        if (body === null || body === undefined) {
+            throw new Error('Required parameter body was null or undefined when calling updatePet.');
         }
 
         let httpRequestParams: ng.IRequestConfig = {
             method: 'PUT',
             url: localVarPath,
-            data: pet,
+            data: body,
             params: queryParameters,
             headers: headerParams
         };
diff --git a/samples/client/petstore/typescript-angularjs/api/StoreApi.ts b/samples/client/petstore/typescript-angularjs/api/StoreApi.ts
index 59775b7f9e..7b66c58e56 100644
--- a/samples/client/petstore/typescript-angularjs/api/StoreApi.ts
+++ b/samples/client/petstore/typescript-angularjs/api/StoreApi.ts
@@ -109,22 +109,22 @@ export class StoreApi {
     /**
      * 
      * @summary Place an order for a pet
-     * @param order order placed for purchasing the pet
+     * @param body order placed for purchasing the pet
      */
-    public placeOrder (order: models.models.Order, extraHttpRequestParams?: any ) : ng.IHttpPromise<models.Order> {
+    public placeOrder (body: models.Order, extraHttpRequestParams?: any ) : ng.IHttpPromise<models.Order> {
         const localVarPath = this.basePath + '/store/order';
 
         let queryParameters: any = {};
         let headerParams: any = (<any>Object).assign({}, this.defaultHeaders);
-        // verify required parameter 'order' is not null or undefined
-        if (order === null || order === undefined) {
-            throw new Error('Required parameter order was null or undefined when calling placeOrder.');
+        // verify required parameter 'body' is not null or undefined
+        if (body === null || body === undefined) {
+            throw new Error('Required parameter body was null or undefined when calling placeOrder.');
         }
 
         let httpRequestParams: ng.IRequestConfig = {
             method: 'POST',
             url: localVarPath,
-            data: order,
+            data: body,
             params: queryParameters,
             headers: headerParams
         };
diff --git a/samples/client/petstore/typescript-angularjs/api/UserApi.ts b/samples/client/petstore/typescript-angularjs/api/UserApi.ts
index eca5ad8055..4079be4dec 100644
--- a/samples/client/petstore/typescript-angularjs/api/UserApi.ts
+++ b/samples/client/petstore/typescript-angularjs/api/UserApi.ts
@@ -29,22 +29,22 @@ export class UserApi {
     /**
      * This can only be done by the logged in user.
      * @summary Create user
-     * @param user Created user object
+     * @param body Created user object
      */
-    public createUser (user: models.models.User, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
+    public createUser (body: models.User, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
         const localVarPath = this.basePath + '/user';
 
         let queryParameters: any = {};
         let headerParams: any = (<any>Object).assign({}, this.defaultHeaders);
-        // verify required parameter 'user' is not null or undefined
-        if (user === null || user === undefined) {
-            throw new Error('Required parameter user was null or undefined when calling createUser.');
+        // verify required parameter 'body' is not null or undefined
+        if (body === null || body === undefined) {
+            throw new Error('Required parameter body was null or undefined when calling createUser.');
         }
 
         let httpRequestParams: ng.IRequestConfig = {
             method: 'POST',
             url: localVarPath,
-            data: user,
+            data: body,
             params: queryParameters,
             headers: headerParams
         };
@@ -58,22 +58,22 @@ export class UserApi {
     /**
      * 
      * @summary Creates list of users with given input array
-     * @param modelsUser List of user object
+     * @param body List of user object
      */
-    public createUsersWithArrayInput (modelsUser: Array<models.User>, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
+    public createUsersWithArrayInput (body: Array<models.User>, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
         const localVarPath = this.basePath + '/user/createWithArray';
 
         let queryParameters: any = {};
         let headerParams: any = (<any>Object).assign({}, this.defaultHeaders);
-        // verify required parameter 'modelsUser' is not null or undefined
-        if (modelsUser === null || modelsUser === undefined) {
-            throw new Error('Required parameter modelsUser was null or undefined when calling createUsersWithArrayInput.');
+        // verify required parameter 'body' is not null or undefined
+        if (body === null || body === undefined) {
+            throw new Error('Required parameter body was null or undefined when calling createUsersWithArrayInput.');
         }
 
         let httpRequestParams: ng.IRequestConfig = {
             method: 'POST',
             url: localVarPath,
-            data: modelsUser,
+            data: body,
             params: queryParameters,
             headers: headerParams
         };
@@ -87,22 +87,22 @@ export class UserApi {
     /**
      * 
      * @summary Creates list of users with given input array
-     * @param modelsUser List of user object
+     * @param body List of user object
      */
-    public createUsersWithListInput (modelsUser: Array<models.User>, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
+    public createUsersWithListInput (body: Array<models.User>, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
         const localVarPath = this.basePath + '/user/createWithList';
 
         let queryParameters: any = {};
         let headerParams: any = (<any>Object).assign({}, this.defaultHeaders);
-        // verify required parameter 'modelsUser' is not null or undefined
-        if (modelsUser === null || modelsUser === undefined) {
-            throw new Error('Required parameter modelsUser was null or undefined when calling createUsersWithListInput.');
+        // verify required parameter 'body' is not null or undefined
+        if (body === null || body === undefined) {
+            throw new Error('Required parameter body was null or undefined when calling createUsersWithListInput.');
         }
 
         let httpRequestParams: ng.IRequestConfig = {
             method: 'POST',
             url: localVarPath,
-            data: modelsUser,
+            data: body,
             params: queryParameters,
             headers: headerParams
         };
@@ -239,9 +239,9 @@ export class UserApi {
      * This can only be done by the logged in user.
      * @summary Updated user
      * @param username name that need to be deleted
-     * @param user Updated user object
+     * @param body Updated user object
      */
-    public updateUser (username: string, user: models.models.User, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
+    public updateUser (username: string, body: models.User, extraHttpRequestParams?: any ) : ng.IHttpPromise<{}> {
         const localVarPath = this.basePath + '/user/{username}'
             .replace('{' + 'username' + '}', encodeURIComponent(String(username)));
 
@@ -252,15 +252,15 @@ export class UserApi {
             throw new Error('Required parameter username was null or undefined when calling updateUser.');
         }
 
-        // verify required parameter 'user' is not null or undefined
-        if (user === null || user === undefined) {
-            throw new Error('Required parameter user was null or undefined when calling updateUser.');
+        // verify required parameter 'body' is not null or undefined
+        if (body === null || body === undefined) {
+            throw new Error('Required parameter body was null or undefined when calling updateUser.');
         }
 
         let httpRequestParams: ng.IRequestConfig = {
             method: 'PUT',
             url: localVarPath,
-            data: user,
+            data: body,
             params: queryParameters,
             headers: headerParams
         };