diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java
index 6bd358bd234..ad2c260cac1 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java
@@ -124,9 +124,9 @@ public class RustClientCodegen extends DefaultCodegen implements CodegenConfig {
         // I tried to map as "std::io::File", but Reqwest multipart file requires a "AsRef<Path>" param.
         // Getting a file from a Path is simple, but the opposite is difficult. So I map as "std::path::Path".
         typeMapping.put("file", "std::path::PathBuf");
-        typeMapping.put("binary", "::models::File");
+        typeMapping.put("binary", "crate::models::File");
         typeMapping.put("ByteArray", "String");
-        typeMapping.put("object", "Value");
+        typeMapping.put("object", "serde_json::Value");
 
         // no need for rust
         //importMapping = new HashMap<String, String>();
@@ -352,8 +352,8 @@ public class RustClientCodegen extends DefaultCodegen implements CodegenConfig {
         }
 
         // return fully-qualified model name
-        // ::models::{{classnameFile}}::{{classname}}
-        return "::models::" + toModelName(schemaType);
+        // crate::models::{{classnameFile}}::{{classname}}
+        return "crate::models::" + toModelName(schemaType);
     }
 
     @Override
diff --git a/modules/openapi-generator/src/main/resources/rust/hyper/api.mustache b/modules/openapi-generator/src/main/resources/rust/hyper/api.mustache
index 426fee7fe80..872148bdddd 100644
--- a/modules/openapi-generator/src/main/resources/rust/hyper/api.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/hyper/api.mustache
@@ -24,7 +24,7 @@ impl<C: hyper::client::Connect> {{{classname}}}Client<C> {
 pub trait {{{classname}}} {
 {{#operations}}
 {{#operation}}
-    fn {{{operationId}}}(&self, {{#allParams}}{{{paramName}}}: {{#isString}}&str{{/isString}}{{#isUuid}}&str{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}::models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) -> Box<Future<Item = {{^returnType}}(){{/returnType}}{{#returnType}}{{{returnType}}}{{/returnType}}, Error = Error<serde_json::Value>>>;
+    fn {{{operationId}}}(&self, {{#allParams}}{{{paramName}}}: {{#isString}}&str{{/isString}}{{#isUuid}}&str{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}crate::models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) -> Box<Future<Item = {{^returnType}}(){{/returnType}}{{#returnType}}{{{returnType}}}{{/returnType}}, Error = Error<serde_json::Value>>>;
 {{/operation}}
 {{/operations}}
 }
@@ -33,7 +33,7 @@ pub trait {{{classname}}} {
 impl<C: hyper::client::Connect>{{{classname}}} for {{{classname}}}Client<C> {
 {{#operations}}
 {{#operation}}
-    fn {{{operationId}}}(&self, {{#allParams}}{{{paramName}}}: {{#isString}}&str{{/isString}}{{#isUuid}}&str{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}::models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) -> Box<Future<Item = {{^returnType}}(){{/returnType}}{{#returnType}}{{{.}}}{{/returnType}}, Error = Error<serde_json::Value>>> {
+    fn {{{operationId}}}(&self, {{#allParams}}{{{paramName}}}: {{#isString}}&str{{/isString}}{{#isUuid}}&str{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}crate::models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) -> Box<Future<Item = {{^returnType}}(){{/returnType}}{{#returnType}}{{{.}}}{{/returnType}}, Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::{{{httpMethod}}}, "{{{path}}}".to_string())
         {{#hasAuthMethods}}
         {{#authMethods}}
diff --git a/modules/openapi-generator/src/main/resources/rust/hyper/client.mustache b/modules/openapi-generator/src/main/resources/rust/hyper/client.mustache
index f93577e7cb1..a0648b758bc 100644
--- a/modules/openapi-generator/src/main/resources/rust/hyper/client.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/hyper/client.mustache
@@ -10,7 +10,7 @@ pub struct APIClient<C: hyper::client::Connect> {
 {{#operations}}
 {{#operation}}
     {{#-last}}
-    {{{classFilename}}}: Box<::apis::{{{classname}}}>,
+    {{{classFilename}}}: Box<crate::apis::{{{classname}}}>,
     {{/-last}}
 {{/operation}}
 {{/operations}}
@@ -29,7 +29,7 @@ impl<C: hyper::client::Connect> APIClient<C> {
 {{#operations}}
 {{#operation}}
             {{#-last}}
-            {{{classFilename}}}: Box::new(::apis::{{{classname}}}Client::new(rc.clone())),
+            {{{classFilename}}}: Box::new(crate::apis::{{{classname}}}Client::new(rc.clone())),
             {{/-last}}
 {{/operation}}
 {{/operations}}
@@ -43,7 +43,7 @@ impl<C: hyper::client::Connect> APIClient<C> {
 {{#operations}}
 {{#operation}}
 {{#-last}}
-    pub fn {{{classFilename}}}(&self) -> &::apis::{{{classname}}}{
+    pub fn {{{classFilename}}}(&self) -> &crate::apis::{{{classname}}}{
         self.{{{classFilename}}}.as_ref()
     }
 
diff --git a/modules/openapi-generator/src/main/resources/rust/model.mustache b/modules/openapi-generator/src/main/resources/rust/model.mustache
index 4c6b8dff10c..37a3ff77bcc 100644
--- a/modules/openapi-generator/src/main/resources/rust/model.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/model.mustache
@@ -5,9 +5,6 @@
 /// {{{classname}}} : {{{description}}}
 {{/description}}
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 {{!-- for enum schemas --}}
 {{#isEnum}}
 /// {{{description}}}
diff --git a/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache b/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache
index e6706f7afe1..038284ec6c3 100644
--- a/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache
@@ -21,7 +21,7 @@ impl {{{classname}}}Client {
 pub trait {{{classname}}} {
 {{#operations}}
 {{#operation}}
-    fn {{{operationId}}}(&self, {{#allParams}}{{{paramName}}}: {{#isString}}&str{{/isString}}{{#isUuid}}&str{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}::models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) -> Result<{{^returnType}}(){{/returnType}}{{#returnType}}{{{returnType}}}{{/returnType}}, Error>;
+    fn {{{operationId}}}(&self, {{#allParams}}{{{paramName}}}: {{#isString}}&str{{/isString}}{{#isUuid}}&str{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}crate::models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) -> Result<{{^returnType}}(){{/returnType}}{{#returnType}}{{{returnType}}}{{/returnType}}, Error>;
 {{/operation}}
 {{/operations}}
 }
@@ -29,7 +29,7 @@ pub trait {{{classname}}} {
 impl {{{classname}}} for {{{classname}}}Client {
 {{#operations}}
 {{#operation}}
-    fn {{{operationId}}}(&self, {{#allParams}}{{{paramName}}}: {{#isString}}&str{{/isString}}{{#isUuid}}&str{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}::models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) -> Result<{{^returnType}}(){{/returnType}}{{#returnType}}{{{returnType}}}{{/returnType}}, Error> {
+    fn {{{operationId}}}(&self, {{#allParams}}{{{paramName}}}: {{#isString}}&str{{/isString}}{{#isUuid}}&str{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}crate::models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) -> Result<{{^returnType}}(){{/returnType}}{{#returnType}}{{{returnType}}}{{/returnType}}, Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
diff --git a/modules/openapi-generator/src/main/resources/rust/reqwest/client.mustache b/modules/openapi-generator/src/main/resources/rust/reqwest/client.mustache
index 33f2b2fd61b..5fdede09c4f 100644
--- a/modules/openapi-generator/src/main/resources/rust/reqwest/client.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/reqwest/client.mustache
@@ -9,7 +9,7 @@ pub struct APIClient {
 {{#operations}}
 {{#operation}}
     {{#-last}}
-    {{{classFilename}}}: Box<::apis::{{{classname}}}>,
+    {{{classFilename}}}: Box<crate::apis::{{{classname}}}>,
     {{/-last}}
 {{/operation}}
 {{/operations}}
@@ -28,7 +28,7 @@ impl APIClient {
 {{#operations}}
 {{#operation}}
             {{#-last}}
-            {{{classFilename}}}: Box::new(::apis::{{{classname}}}Client::new(rc.clone())),
+            {{{classFilename}}}: Box::new(crate::apis::{{{classname}}}Client::new(rc.clone())),
             {{/-last}}
 {{/operation}}
 {{/operations}}
@@ -42,7 +42,7 @@ impl APIClient {
 {{#operations}}
 {{#operation}}
 {{#-last}}
-    pub fn {{{classFilename}}}(&self) -> &::apis::{{{classname}}}{
+    pub fn {{{classFilename}}}(&self) -> &crate::apis::{{{classname}}}{
         self.{{{classFilename}}}.as_ref()
     }
 
diff --git a/samples/client/petstore/rust-reqwest/.openapi-generator/VERSION b/samples/client/petstore/rust-reqwest/.openapi-generator/VERSION
index d96260ba335..83a328a9227 100644
--- a/samples/client/petstore/rust-reqwest/.openapi-generator/VERSION
+++ b/samples/client/petstore/rust-reqwest/.openapi-generator/VERSION
@@ -1 +1 @@
-4.0.2-SNAPSHOT
\ No newline at end of file
+4.1.0-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore/rust-reqwest/docs/Pet.md b/samples/client/petstore/rust-reqwest/docs/Pet.md
index 53a462e68b9..2c8ea36dd91 100644
--- a/samples/client/petstore/rust-reqwest/docs/Pet.md
+++ b/samples/client/petstore/rust-reqwest/docs/Pet.md
@@ -5,10 +5,10 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **id** | **i64** |  | [optional] 
-**category** | [***::models::Category**](Category.md) |  | [optional] 
+**category** | [***crate::models::Category**](Category.md) |  | [optional] 
 **name** | **String** |  | 
 **photo_urls** | **Vec<String>** |  | 
-**tags** | [**Vec<::models::Tag>**](Tag.md) |  | [optional] 
+**tags** | [**Vec<crate::models::Tag>**](Tag.md) |  | [optional] 
 **status** | **String** | pet status in the store | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/rust-reqwest/docs/PetApi.md b/samples/client/petstore/rust-reqwest/docs/PetApi.md
index a74635038e7..336116bee51 100644
--- a/samples/client/petstore/rust-reqwest/docs/PetApi.md
+++ b/samples/client/petstore/rust-reqwest/docs/PetApi.md
@@ -85,7 +85,7 @@ Name | Type | Description  | Notes
 
 ## find_pets_by_status
 
-> Vec<::models::Pet> find_pets_by_status(ctx, status)
+> Vec<crate::models::Pet> find_pets_by_status(ctx, status)
 Finds Pets by status
 
 Multiple status values can be provided with comma separated strings
@@ -100,7 +100,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**Vec<::models::Pet>**](Pet.md)
+[**Vec<crate::models::Pet>**](Pet.md)
 
 ### Authorization
 
@@ -116,7 +116,7 @@ Name | Type | Description  | Notes
 
 ## find_pets_by_tags
 
-> Vec<::models::Pet> find_pets_by_tags(ctx, tags)
+> Vec<crate::models::Pet> find_pets_by_tags(ctx, tags)
 Finds Pets by tags
 
 Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
@@ -131,7 +131,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**Vec<::models::Pet>**](Pet.md)
+[**Vec<crate::models::Pet>**](Pet.md)
 
 ### Authorization
 
@@ -147,7 +147,7 @@ Name | Type | Description  | Notes
 
 ## get_pet_by_id
 
-> ::models::Pet get_pet_by_id(ctx, pet_id)
+> crate::models::Pet get_pet_by_id(ctx, pet_id)
 Find pet by ID
 
 Returns a single pet
@@ -162,7 +162,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::Pet**](Pet.md)
+[**crate::models::Pet**](Pet.md)
 
 ### Authorization
 
@@ -247,7 +247,7 @@ Name | Type | Description  | Notes
 
 ## upload_file
 
-> ::models::ApiResponse upload_file(ctx, pet_id, optional)
+> crate::models::ApiResponse upload_file(ctx, pet_id, optional)
 uploads an image
 
 ### Required Parameters
@@ -271,7 +271,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::ApiResponse**](ApiResponse.md)
+[**crate::models::ApiResponse**](ApiResponse.md)
 
 ### Authorization
 
diff --git a/samples/client/petstore/rust-reqwest/docs/StoreApi.md b/samples/client/petstore/rust-reqwest/docs/StoreApi.md
index e57378b9f84..28ae8c60af6 100644
--- a/samples/client/petstore/rust-reqwest/docs/StoreApi.md
+++ b/samples/client/petstore/rust-reqwest/docs/StoreApi.md
@@ -70,7 +70,7 @@ This endpoint does not need any parameter.
 
 ## get_order_by_id
 
-> ::models::Order get_order_by_id(order_id)
+> crate::models::Order get_order_by_id(order_id)
 Find purchase order by ID
 
 For valid response try integer IDs with value <= 5 or > 10. Other values will generated exceptions
@@ -84,7 +84,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::Order**](Order.md)
+[**crate::models::Order**](Order.md)
 
 ### Authorization
 
@@ -100,7 +100,7 @@ No authorization required
 
 ## place_order
 
-> ::models::Order place_order(body)
+> crate::models::Order place_order(body)
 Place an order for a pet
 
 ### Required Parameters
@@ -112,7 +112,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::Order**](Order.md)
+[**crate::models::Order**](Order.md)
 
 ### Authorization
 
diff --git a/samples/client/petstore/rust-reqwest/docs/UserApi.md b/samples/client/petstore/rust-reqwest/docs/UserApi.md
index d469a52df88..ce5490e8062 100644
--- a/samples/client/petstore/rust-reqwest/docs/UserApi.md
+++ b/samples/client/petstore/rust-reqwest/docs/UserApi.md
@@ -55,7 +55,7 @@ Creates list of users with given input array
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
-  **body** | [**Vec<::models::User>**](User.md)| List of user object | 
+  **body** | [**Vec<crate::models::User>**](User.md)| List of user object | 
 
 ### Return type
 
@@ -83,7 +83,7 @@ Creates list of users with given input array
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
-  **body** | [**Vec<::models::User>**](User.md)| List of user object | 
+  **body** | [**Vec<crate::models::User>**](User.md)| List of user object | 
 
 ### Return type
 
@@ -133,7 +133,7 @@ No authorization required
 
 ## get_user_by_name
 
-> ::models::User get_user_by_name(username)
+> crate::models::User get_user_by_name(username)
 Get user by user name
 
 ### Required Parameters
@@ -145,7 +145,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::User**](User.md)
+[**crate::models::User**](User.md)
 
 ### Authorization
 
diff --git a/samples/client/petstore/rust-reqwest/src/apis/client.rs b/samples/client/petstore/rust-reqwest/src/apis/client.rs
index ea6b0eb635b..14088cbe309 100644
--- a/samples/client/petstore/rust-reqwest/src/apis/client.rs
+++ b/samples/client/petstore/rust-reqwest/src/apis/client.rs
@@ -4,9 +4,9 @@ use super::configuration::Configuration;
 
 pub struct APIClient {
     configuration: Rc<Configuration>,
-    pet_api: Box<::apis::PetApi>,
-    store_api: Box<::apis::StoreApi>,
-    user_api: Box<::apis::UserApi>,
+    pet_api: Box<crate::apis::PetApi>,
+    store_api: Box<crate::apis::StoreApi>,
+    user_api: Box<crate::apis::UserApi>,
 }
 
 impl APIClient {
@@ -15,21 +15,21 @@ impl APIClient {
 
         APIClient {
             configuration: rc.clone(),
-            pet_api: Box::new(::apis::PetApiClient::new(rc.clone())),
-            store_api: Box::new(::apis::StoreApiClient::new(rc.clone())),
-            user_api: Box::new(::apis::UserApiClient::new(rc.clone())),
+            pet_api: Box::new(crate::apis::PetApiClient::new(rc.clone())),
+            store_api: Box::new(crate::apis::StoreApiClient::new(rc.clone())),
+            user_api: Box::new(crate::apis::UserApiClient::new(rc.clone())),
         }
     }
 
-    pub fn pet_api(&self) -> &::apis::PetApi{
+    pub fn pet_api(&self) -> &crate::apis::PetApi{
         self.pet_api.as_ref()
     }
 
-    pub fn store_api(&self) -> &::apis::StoreApi{
+    pub fn store_api(&self) -> &crate::apis::StoreApi{
         self.store_api.as_ref()
     }
 
-    pub fn user_api(&self) -> &::apis::UserApi{
+    pub fn user_api(&self) -> &crate::apis::UserApi{
         self.user_api.as_ref()
     }
 
diff --git a/samples/client/petstore/rust-reqwest/src/apis/pet_api.rs b/samples/client/petstore/rust-reqwest/src/apis/pet_api.rs
index 53d2b82ea72..264fc30e685 100644
--- a/samples/client/petstore/rust-reqwest/src/apis/pet_api.rs
+++ b/samples/client/petstore/rust-reqwest/src/apis/pet_api.rs
@@ -28,18 +28,18 @@ impl PetApiClient {
 }
 
 pub trait PetApi {
-    fn add_pet(&self, body: ::models::Pet) -> Result<(), Error>;
+    fn add_pet(&self, body: crate::models::Pet) -> Result<(), Error>;
     fn delete_pet(&self, pet_id: i64, api_key: &str) -> Result<(), Error>;
-    fn find_pets_by_status(&self, status: Vec<String>) -> Result<Vec<::models::Pet>, Error>;
-    fn find_pets_by_tags(&self, tags: Vec<String>) -> Result<Vec<::models::Pet>, Error>;
-    fn get_pet_by_id(&self, pet_id: i64) -> Result<::models::Pet, Error>;
-    fn update_pet(&self, body: ::models::Pet) -> Result<(), Error>;
+    fn find_pets_by_status(&self, status: Vec<String>) -> Result<Vec<crate::models::Pet>, Error>;
+    fn find_pets_by_tags(&self, tags: Vec<String>) -> Result<Vec<crate::models::Pet>, Error>;
+    fn get_pet_by_id(&self, pet_id: i64) -> Result<crate::models::Pet, Error>;
+    fn update_pet(&self, body: crate::models::Pet) -> Result<(), Error>;
     fn update_pet_with_form(&self, pet_id: i64, name: &str, status: &str) -> Result<(), Error>;
-    fn upload_file(&self, pet_id: i64, additional_metadata: &str, file: std::path::PathBuf) -> Result<::models::ApiResponse, Error>;
+    fn upload_file(&self, pet_id: i64, additional_metadata: &str, file: std::path::PathBuf) -> Result<crate::models::ApiResponse, Error>;
 }
 
 impl PetApi for PetApiClient {
-    fn add_pet(&self, body: ::models::Pet) -> Result<(), Error> {
+    fn add_pet(&self, body: crate::models::Pet) -> Result<(), Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -83,7 +83,7 @@ impl PetApi for PetApiClient {
         Ok(())
     }
 
-    fn find_pets_by_status(&self, status: Vec<String>) -> Result<Vec<::models::Pet>, Error> {
+    fn find_pets_by_status(&self, status: Vec<String>) -> Result<Vec<crate::models::Pet>, Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -104,7 +104,7 @@ impl PetApi for PetApiClient {
         Ok(client.execute(req)?.error_for_status()?.json()?)
     }
 
-    fn find_pets_by_tags(&self, tags: Vec<String>) -> Result<Vec<::models::Pet>, Error> {
+    fn find_pets_by_tags(&self, tags: Vec<String>) -> Result<Vec<crate::models::Pet>, Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -125,7 +125,7 @@ impl PetApi for PetApiClient {
         Ok(client.execute(req)?.error_for_status()?.json()?)
     }
 
-    fn get_pet_by_id(&self, pet_id: i64) -> Result<::models::Pet, Error> {
+    fn get_pet_by_id(&self, pet_id: i64) -> Result<crate::models::Pet, Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -150,7 +150,7 @@ impl PetApi for PetApiClient {
         Ok(client.execute(req)?.error_for_status()?.json()?)
     }
 
-    fn update_pet(&self, body: ::models::Pet) -> Result<(), Error> {
+    fn update_pet(&self, body: crate::models::Pet) -> Result<(), Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -197,7 +197,7 @@ impl PetApi for PetApiClient {
         Ok(())
     }
 
-    fn upload_file(&self, pet_id: i64, additional_metadata: &str, file: std::path::PathBuf) -> Result<::models::ApiResponse, Error> {
+    fn upload_file(&self, pet_id: i64, additional_metadata: &str, file: std::path::PathBuf) -> Result<crate::models::ApiResponse, Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
diff --git a/samples/client/petstore/rust-reqwest/src/apis/store_api.rs b/samples/client/petstore/rust-reqwest/src/apis/store_api.rs
index d9d60f09960..dac744b3b21 100644
--- a/samples/client/petstore/rust-reqwest/src/apis/store_api.rs
+++ b/samples/client/petstore/rust-reqwest/src/apis/store_api.rs
@@ -30,8 +30,8 @@ impl StoreApiClient {
 pub trait StoreApi {
     fn delete_order(&self, order_id: &str) -> Result<(), Error>;
     fn get_inventory(&self, ) -> Result<::std::collections::HashMap<String, i32>, Error>;
-    fn get_order_by_id(&self, order_id: i64) -> Result<::models::Order, Error>;
-    fn place_order(&self, body: ::models::Order) -> Result<::models::Order, Error>;
+    fn get_order_by_id(&self, order_id: i64) -> Result<crate::models::Order, Error>;
+    fn place_order(&self, body: crate::models::Order) -> Result<crate::models::Order, Error>;
 }
 
 impl StoreApi for StoreApiClient {
@@ -78,7 +78,7 @@ impl StoreApi for StoreApiClient {
         Ok(client.execute(req)?.error_for_status()?.json()?)
     }
 
-    fn get_order_by_id(&self, order_id: i64) -> Result<::models::Order, Error> {
+    fn get_order_by_id(&self, order_id: i64) -> Result<crate::models::Order, Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -95,7 +95,7 @@ impl StoreApi for StoreApiClient {
         Ok(client.execute(req)?.error_for_status()?.json()?)
     }
 
-    fn place_order(&self, body: ::models::Order) -> Result<::models::Order, Error> {
+    fn place_order(&self, body: crate::models::Order) -> Result<crate::models::Order, Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
diff --git a/samples/client/petstore/rust-reqwest/src/apis/user_api.rs b/samples/client/petstore/rust-reqwest/src/apis/user_api.rs
index 68d4c9f1266..e2321b3daa4 100644
--- a/samples/client/petstore/rust-reqwest/src/apis/user_api.rs
+++ b/samples/client/petstore/rust-reqwest/src/apis/user_api.rs
@@ -28,18 +28,18 @@ impl UserApiClient {
 }
 
 pub trait UserApi {
-    fn create_user(&self, body: ::models::User) -> Result<(), Error>;
-    fn create_users_with_array_input(&self, body: Vec<::models::User>) -> Result<(), Error>;
-    fn create_users_with_list_input(&self, body: Vec<::models::User>) -> Result<(), Error>;
+    fn create_user(&self, body: crate::models::User) -> Result<(), Error>;
+    fn create_users_with_array_input(&self, body: Vec<crate::models::User>) -> Result<(), Error>;
+    fn create_users_with_list_input(&self, body: Vec<crate::models::User>) -> Result<(), Error>;
     fn delete_user(&self, username: &str) -> Result<(), Error>;
-    fn get_user_by_name(&self, username: &str) -> Result<::models::User, Error>;
+    fn get_user_by_name(&self, username: &str) -> Result<crate::models::User, Error>;
     fn login_user(&self, username: &str, password: &str) -> Result<String, Error>;
     fn logout_user(&self, ) -> Result<(), Error>;
-    fn update_user(&self, username: &str, body: ::models::User) -> Result<(), Error>;
+    fn update_user(&self, username: &str, body: crate::models::User) -> Result<(), Error>;
 }
 
 impl UserApi for UserApiClient {
-    fn create_user(&self, body: ::models::User) -> Result<(), Error> {
+    fn create_user(&self, body: crate::models::User) -> Result<(), Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -58,7 +58,7 @@ impl UserApi for UserApiClient {
         Ok(())
     }
 
-    fn create_users_with_array_input(&self, body: Vec<::models::User>) -> Result<(), Error> {
+    fn create_users_with_array_input(&self, body: Vec<crate::models::User>) -> Result<(), Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -77,7 +77,7 @@ impl UserApi for UserApiClient {
         Ok(())
     }
 
-    fn create_users_with_list_input(&self, body: Vec<::models::User>) -> Result<(), Error> {
+    fn create_users_with_list_input(&self, body: Vec<crate::models::User>) -> Result<(), Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -114,7 +114,7 @@ impl UserApi for UserApiClient {
         Ok(())
     }
 
-    fn get_user_by_name(&self, username: &str) -> Result<::models::User, Error> {
+    fn get_user_by_name(&self, username: &str) -> Result<crate::models::User, Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
@@ -168,7 +168,7 @@ impl UserApi for UserApiClient {
         Ok(())
     }
 
-    fn update_user(&self, username: &str, body: ::models::User) -> Result<(), Error> {
+    fn update_user(&self, username: &str, body: crate::models::User) -> Result<(), Error> {
         let configuration: &configuration::Configuration = self.configuration.borrow();
         let client = &configuration.client;
 
diff --git a/samples/client/petstore/rust-reqwest/src/models/api_response.rs b/samples/client/petstore/rust-reqwest/src/models/api_response.rs
index 7884fba590e..814483602dd 100644
--- a/samples/client/petstore/rust-reqwest/src/models/api_response.rs
+++ b/samples/client/petstore/rust-reqwest/src/models/api_response.rs
@@ -10,9 +10,6 @@
 
 /// ApiResponse : Describes the result of uploading an image resource
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct ApiResponse {
diff --git a/samples/client/petstore/rust-reqwest/src/models/category.rs b/samples/client/petstore/rust-reqwest/src/models/category.rs
index 804f9f4c707..8cb5797ee1c 100644
--- a/samples/client/petstore/rust-reqwest/src/models/category.rs
+++ b/samples/client/petstore/rust-reqwest/src/models/category.rs
@@ -10,9 +10,6 @@
 
 /// Category : A category for a pet
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Category {
diff --git a/samples/client/petstore/rust-reqwest/src/models/order.rs b/samples/client/petstore/rust-reqwest/src/models/order.rs
index 118dc310767..24ad342497a 100644
--- a/samples/client/petstore/rust-reqwest/src/models/order.rs
+++ b/samples/client/petstore/rust-reqwest/src/models/order.rs
@@ -10,9 +10,6 @@
 
 /// Order : An order for a pets from the pet store
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Order {
diff --git a/samples/client/petstore/rust-reqwest/src/models/pet.rs b/samples/client/petstore/rust-reqwest/src/models/pet.rs
index 64dae06e454..e3c61239cdc 100644
--- a/samples/client/petstore/rust-reqwest/src/models/pet.rs
+++ b/samples/client/petstore/rust-reqwest/src/models/pet.rs
@@ -10,22 +10,19 @@
 
 /// Pet : A pet for sale in the pet store
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Pet {
     #[serde(rename = "id", skip_serializing_if = "Option::is_none")]
     pub id: Option<i64>,
     #[serde(rename = "category", skip_serializing_if = "Option::is_none")]
-    pub category: Option<::models::Category>,
+    pub category: Option<crate::models::Category>,
     #[serde(rename = "name")]
     pub name: String,
     #[serde(rename = "photoUrls")]
     pub photo_urls: Vec<String>,
     #[serde(rename = "tags", skip_serializing_if = "Option::is_none")]
-    pub tags: Option<Vec<::models::Tag>>,
+    pub tags: Option<Vec<crate::models::Tag>>,
     /// pet status in the store
     #[serde(rename = "status", skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
diff --git a/samples/client/petstore/rust-reqwest/src/models/tag.rs b/samples/client/petstore/rust-reqwest/src/models/tag.rs
index 503fb7f61bd..c7cbdf2cc05 100644
--- a/samples/client/petstore/rust-reqwest/src/models/tag.rs
+++ b/samples/client/petstore/rust-reqwest/src/models/tag.rs
@@ -10,9 +10,6 @@
 
 /// Tag : A tag for a pet
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Tag {
diff --git a/samples/client/petstore/rust-reqwest/src/models/user.rs b/samples/client/petstore/rust-reqwest/src/models/user.rs
index 6bfa6e2167a..e54ed701306 100644
--- a/samples/client/petstore/rust-reqwest/src/models/user.rs
+++ b/samples/client/petstore/rust-reqwest/src/models/user.rs
@@ -10,9 +10,6 @@
 
 /// User : A User who is purchasing from the pet store
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct User {
diff --git a/samples/client/petstore/rust/.openapi-generator/VERSION b/samples/client/petstore/rust/.openapi-generator/VERSION
index d96260ba335..83a328a9227 100644
--- a/samples/client/petstore/rust/.openapi-generator/VERSION
+++ b/samples/client/petstore/rust/.openapi-generator/VERSION
@@ -1 +1 @@
-4.0.2-SNAPSHOT
\ No newline at end of file
+4.1.0-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore/rust/docs/Pet.md b/samples/client/petstore/rust/docs/Pet.md
index 53a462e68b9..2c8ea36dd91 100644
--- a/samples/client/petstore/rust/docs/Pet.md
+++ b/samples/client/petstore/rust/docs/Pet.md
@@ -5,10 +5,10 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **id** | **i64** |  | [optional] 
-**category** | [***::models::Category**](Category.md) |  | [optional] 
+**category** | [***crate::models::Category**](Category.md) |  | [optional] 
 **name** | **String** |  | 
 **photo_urls** | **Vec<String>** |  | 
-**tags** | [**Vec<::models::Tag>**](Tag.md) |  | [optional] 
+**tags** | [**Vec<crate::models::Tag>**](Tag.md) |  | [optional] 
 **status** | **String** | pet status in the store | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/rust/docs/PetApi.md b/samples/client/petstore/rust/docs/PetApi.md
index e690c805185..4d5e4c7839b 100644
--- a/samples/client/petstore/rust/docs/PetApi.md
+++ b/samples/client/petstore/rust/docs/PetApi.md
@@ -85,7 +85,7 @@ Name | Type | Description  | Notes
 
 ## find_pets_by_status
 
-> Vec<::models::Pet> find_pets_by_status(ctx, status)
+> Vec<crate::models::Pet> find_pets_by_status(ctx, status)
 Finds Pets by status
 
 Multiple status values can be provided with comma separated strings
@@ -100,7 +100,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**Vec<::models::Pet>**](Pet.md)
+[**Vec<crate::models::Pet>**](Pet.md)
 
 ### Authorization
 
@@ -116,7 +116,7 @@ Name | Type | Description  | Notes
 
 ## find_pets_by_tags
 
-> Vec<::models::Pet> find_pets_by_tags(ctx, tags)
+> Vec<crate::models::Pet> find_pets_by_tags(ctx, tags)
 Finds Pets by tags
 
 Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
@@ -131,7 +131,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**Vec<::models::Pet>**](Pet.md)
+[**Vec<crate::models::Pet>**](Pet.md)
 
 ### Authorization
 
@@ -147,7 +147,7 @@ Name | Type | Description  | Notes
 
 ## get_pet_by_id
 
-> ::models::Pet get_pet_by_id(ctx, pet_id)
+> crate::models::Pet get_pet_by_id(ctx, pet_id)
 Find pet by ID
 
 Returns a single pet
@@ -162,7 +162,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::Pet**](Pet.md)
+[**crate::models::Pet**](Pet.md)
 
 ### Authorization
 
@@ -247,7 +247,7 @@ Name | Type | Description  | Notes
 
 ## upload_file
 
-> ::models::ApiResponse upload_file(ctx, pet_id, optional)
+> crate::models::ApiResponse upload_file(ctx, pet_id, optional)
 uploads an image
 
 ### Required Parameters
@@ -271,7 +271,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::ApiResponse**](ApiResponse.md)
+[**crate::models::ApiResponse**](ApiResponse.md)
 
 ### Authorization
 
diff --git a/samples/client/petstore/rust/docs/StoreApi.md b/samples/client/petstore/rust/docs/StoreApi.md
index 1e4bdc3e14a..16a09fae3fa 100644
--- a/samples/client/petstore/rust/docs/StoreApi.md
+++ b/samples/client/petstore/rust/docs/StoreApi.md
@@ -70,7 +70,7 @@ This endpoint does not need any parameter.
 
 ## get_order_by_id
 
-> ::models::Order get_order_by_id(order_id)
+> crate::models::Order get_order_by_id(order_id)
 Find purchase order by ID
 
 For valid response try integer IDs with value <= 5 or > 10. Other values will generated exceptions
@@ -84,7 +84,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::Order**](Order.md)
+[**crate::models::Order**](Order.md)
 
 ### Authorization
 
@@ -100,7 +100,7 @@ No authorization required
 
 ## place_order
 
-> ::models::Order place_order(body)
+> crate::models::Order place_order(body)
 Place an order for a pet
 
 ### Required Parameters
@@ -112,7 +112,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::Order**](Order.md)
+[**crate::models::Order**](Order.md)
 
 ### Authorization
 
diff --git a/samples/client/petstore/rust/docs/UserApi.md b/samples/client/petstore/rust/docs/UserApi.md
index ffa733d64de..9c4af81392a 100644
--- a/samples/client/petstore/rust/docs/UserApi.md
+++ b/samples/client/petstore/rust/docs/UserApi.md
@@ -55,7 +55,7 @@ Creates list of users with given input array
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
-  **body** | [**Vec<::models::User>**](User.md)| List of user object | 
+  **body** | [**Vec<crate::models::User>**](User.md)| List of user object | 
 
 ### Return type
 
@@ -83,7 +83,7 @@ Creates list of users with given input array
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
-  **body** | [**Vec<::models::User>**](User.md)| List of user object | 
+  **body** | [**Vec<crate::models::User>**](User.md)| List of user object | 
 
 ### Return type
 
@@ -133,7 +133,7 @@ No authorization required
 
 ## get_user_by_name
 
-> ::models::User get_user_by_name(username)
+> crate::models::User get_user_by_name(username)
 Get user by user name
 
 ### Required Parameters
@@ -145,7 +145,7 @@ Name | Type | Description  | Notes
 
 ### Return type
 
-[**::models::User**](User.md)
+[**crate::models::User**](User.md)
 
 ### Authorization
 
diff --git a/samples/client/petstore/rust/src/apis/client.rs b/samples/client/petstore/rust/src/apis/client.rs
index ddf5f6ee086..dd0de97eb53 100644
--- a/samples/client/petstore/rust/src/apis/client.rs
+++ b/samples/client/petstore/rust/src/apis/client.rs
@@ -5,9 +5,9 @@ use super::configuration::Configuration;
 
 pub struct APIClient<C: hyper::client::Connect> {
     configuration: Rc<Configuration<C>>,
-    pet_api: Box<::apis::PetApi>,
-    store_api: Box<::apis::StoreApi>,
-    user_api: Box<::apis::UserApi>,
+    pet_api: Box<crate::apis::PetApi>,
+    store_api: Box<crate::apis::StoreApi>,
+    user_api: Box<crate::apis::UserApi>,
 }
 
 impl<C: hyper::client::Connect> APIClient<C> {
@@ -16,21 +16,21 @@ impl<C: hyper::client::Connect> APIClient<C> {
 
         APIClient {
             configuration: rc.clone(),
-            pet_api: Box::new(::apis::PetApiClient::new(rc.clone())),
-            store_api: Box::new(::apis::StoreApiClient::new(rc.clone())),
-            user_api: Box::new(::apis::UserApiClient::new(rc.clone())),
+            pet_api: Box::new(crate::apis::PetApiClient::new(rc.clone())),
+            store_api: Box::new(crate::apis::StoreApiClient::new(rc.clone())),
+            user_api: Box::new(crate::apis::UserApiClient::new(rc.clone())),
         }
     }
 
-    pub fn pet_api(&self) -> &::apis::PetApi{
+    pub fn pet_api(&self) -> &crate::apis::PetApi{
         self.pet_api.as_ref()
     }
 
-    pub fn store_api(&self) -> &::apis::StoreApi{
+    pub fn store_api(&self) -> &crate::apis::StoreApi{
         self.store_api.as_ref()
     }
 
-    pub fn user_api(&self) -> &::apis::UserApi{
+    pub fn user_api(&self) -> &crate::apis::UserApi{
         self.user_api.as_ref()
     }
 
diff --git a/samples/client/petstore/rust/src/apis/pet_api.rs b/samples/client/petstore/rust/src/apis/pet_api.rs
index 0c98efec5cf..e3fe372fc9b 100644
--- a/samples/client/petstore/rust/src/apis/pet_api.rs
+++ b/samples/client/petstore/rust/src/apis/pet_api.rs
@@ -31,19 +31,19 @@ impl<C: hyper::client::Connect> PetApiClient<C> {
 }
 
 pub trait PetApi {
-    fn add_pet(&self, body: ::models::Pet) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
+    fn add_pet(&self, body: crate::models::Pet) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
     fn delete_pet(&self, pet_id: i64, api_key: &str) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
-    fn find_pets_by_status(&self, status: Vec<String>) -> Box<Future<Item = Vec<::models::Pet>, Error = Error<serde_json::Value>>>;
-    fn find_pets_by_tags(&self, tags: Vec<String>) -> Box<Future<Item = Vec<::models::Pet>, Error = Error<serde_json::Value>>>;
-    fn get_pet_by_id(&self, pet_id: i64) -> Box<Future<Item = ::models::Pet, Error = Error<serde_json::Value>>>;
-    fn update_pet(&self, body: ::models::Pet) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
+    fn find_pets_by_status(&self, status: Vec<String>) -> Box<Future<Item = Vec<crate::models::Pet>, Error = Error<serde_json::Value>>>;
+    fn find_pets_by_tags(&self, tags: Vec<String>) -> Box<Future<Item = Vec<crate::models::Pet>, Error = Error<serde_json::Value>>>;
+    fn get_pet_by_id(&self, pet_id: i64) -> Box<Future<Item = crate::models::Pet, Error = Error<serde_json::Value>>>;
+    fn update_pet(&self, body: crate::models::Pet) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
     fn update_pet_with_form(&self, pet_id: i64, name: &str, status: &str) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
-    fn upload_file(&self, pet_id: i64, additional_metadata: &str, file: std::path::PathBuf) -> Box<Future<Item = ::models::ApiResponse, Error = Error<serde_json::Value>>>;
+    fn upload_file(&self, pet_id: i64, additional_metadata: &str, file: std::path::PathBuf) -> Box<Future<Item = crate::models::ApiResponse, Error = Error<serde_json::Value>>>;
 }
 
 
 impl<C: hyper::client::Connect>PetApi for PetApiClient<C> {
-    fn add_pet(&self, body: ::models::Pet) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
+    fn add_pet(&self, body: crate::models::Pet) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Post, "/pet".to_string())
             .with_auth(__internal_request::Auth::Oauth)
             .with_body_param(body)
@@ -60,21 +60,21 @@ impl<C: hyper::client::Connect>PetApi for PetApiClient<C> {
             .execute(self.configuration.borrow())
     }
 
-    fn find_pets_by_status(&self, status: Vec<String>) -> Box<Future<Item = Vec<::models::Pet>, Error = Error<serde_json::Value>>> {
+    fn find_pets_by_status(&self, status: Vec<String>) -> Box<Future<Item = Vec<crate::models::Pet>, Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Get, "/pet/findByStatus".to_string())
             .with_auth(__internal_request::Auth::Oauth)
             .with_query_param("status".to_string(), status.join(",").to_string())
             .execute(self.configuration.borrow())
     }
 
-    fn find_pets_by_tags(&self, tags: Vec<String>) -> Box<Future<Item = Vec<::models::Pet>, Error = Error<serde_json::Value>>> {
+    fn find_pets_by_tags(&self, tags: Vec<String>) -> Box<Future<Item = Vec<crate::models::Pet>, Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Get, "/pet/findByTags".to_string())
             .with_auth(__internal_request::Auth::Oauth)
             .with_query_param("tags".to_string(), tags.join(",").to_string())
             .execute(self.configuration.borrow())
     }
 
-    fn get_pet_by_id(&self, pet_id: i64) -> Box<Future<Item = ::models::Pet, Error = Error<serde_json::Value>>> {
+    fn get_pet_by_id(&self, pet_id: i64) -> Box<Future<Item = crate::models::Pet, Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Get, "/pet/{petId}".to_string())
             .with_auth(__internal_request::Auth::ApiKey(__internal_request::ApiKey{
                 in_header: true,
@@ -85,7 +85,7 @@ impl<C: hyper::client::Connect>PetApi for PetApiClient<C> {
             .execute(self.configuration.borrow())
     }
 
-    fn update_pet(&self, body: ::models::Pet) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
+    fn update_pet(&self, body: crate::models::Pet) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Put, "/pet".to_string())
             .with_auth(__internal_request::Auth::Oauth)
             .with_body_param(body)
@@ -103,7 +103,7 @@ impl<C: hyper::client::Connect>PetApi for PetApiClient<C> {
             .execute(self.configuration.borrow())
     }
 
-    fn upload_file(&self, pet_id: i64, additional_metadata: &str, file: std::path::PathBuf) -> Box<Future<Item = ::models::ApiResponse, Error = Error<serde_json::Value>>> {
+    fn upload_file(&self, pet_id: i64, additional_metadata: &str, file: std::path::PathBuf) -> Box<Future<Item = crate::models::ApiResponse, Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Post, "/pet/{petId}/uploadImage".to_string())
             .with_auth(__internal_request::Auth::Oauth)
             .with_path_param("petId".to_string(), pet_id.to_string())
diff --git a/samples/client/petstore/rust/src/apis/store_api.rs b/samples/client/petstore/rust/src/apis/store_api.rs
index 46f0bf53cf4..2c827cce045 100644
--- a/samples/client/petstore/rust/src/apis/store_api.rs
+++ b/samples/client/petstore/rust/src/apis/store_api.rs
@@ -33,8 +33,8 @@ impl<C: hyper::client::Connect> StoreApiClient<C> {
 pub trait StoreApi {
     fn delete_order(&self, order_id: &str) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
     fn get_inventory(&self, ) -> Box<Future<Item = ::std::collections::HashMap<String, i32>, Error = Error<serde_json::Value>>>;
-    fn get_order_by_id(&self, order_id: i64) -> Box<Future<Item = ::models::Order, Error = Error<serde_json::Value>>>;
-    fn place_order(&self, body: ::models::Order) -> Box<Future<Item = ::models::Order, Error = Error<serde_json::Value>>>;
+    fn get_order_by_id(&self, order_id: i64) -> Box<Future<Item = crate::models::Order, Error = Error<serde_json::Value>>>;
+    fn place_order(&self, body: crate::models::Order) -> Box<Future<Item = crate::models::Order, Error = Error<serde_json::Value>>>;
 }
 
 
@@ -56,13 +56,13 @@ impl<C: hyper::client::Connect>StoreApi for StoreApiClient<C> {
             .execute(self.configuration.borrow())
     }
 
-    fn get_order_by_id(&self, order_id: i64) -> Box<Future<Item = ::models::Order, Error = Error<serde_json::Value>>> {
+    fn get_order_by_id(&self, order_id: i64) -> Box<Future<Item = crate::models::Order, Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Get, "/store/order/{orderId}".to_string())
             .with_path_param("orderId".to_string(), order_id.to_string())
             .execute(self.configuration.borrow())
     }
 
-    fn place_order(&self, body: ::models::Order) -> Box<Future<Item = ::models::Order, Error = Error<serde_json::Value>>> {
+    fn place_order(&self, body: crate::models::Order) -> Box<Future<Item = crate::models::Order, Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Post, "/store/order".to_string())
             .with_body_param(body)
             .execute(self.configuration.borrow())
diff --git a/samples/client/petstore/rust/src/apis/user_api.rs b/samples/client/petstore/rust/src/apis/user_api.rs
index ba3ad140b46..1ea00f7536d 100644
--- a/samples/client/petstore/rust/src/apis/user_api.rs
+++ b/samples/client/petstore/rust/src/apis/user_api.rs
@@ -31,33 +31,33 @@ impl<C: hyper::client::Connect> UserApiClient<C> {
 }
 
 pub trait UserApi {
-    fn create_user(&self, body: ::models::User) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
-    fn create_users_with_array_input(&self, body: Vec<::models::User>) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
-    fn create_users_with_list_input(&self, body: Vec<::models::User>) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
+    fn create_user(&self, body: crate::models::User) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
+    fn create_users_with_array_input(&self, body: Vec<crate::models::User>) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
+    fn create_users_with_list_input(&self, body: Vec<crate::models::User>) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
     fn delete_user(&self, username: &str) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
-    fn get_user_by_name(&self, username: &str) -> Box<Future<Item = ::models::User, Error = Error<serde_json::Value>>>;
+    fn get_user_by_name(&self, username: &str) -> Box<Future<Item = crate::models::User, Error = Error<serde_json::Value>>>;
     fn login_user(&self, username: &str, password: &str) -> Box<Future<Item = String, Error = Error<serde_json::Value>>>;
     fn logout_user(&self, ) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
-    fn update_user(&self, username: &str, body: ::models::User) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
+    fn update_user(&self, username: &str, body: crate::models::User) -> Box<Future<Item = (), Error = Error<serde_json::Value>>>;
 }
 
 
 impl<C: hyper::client::Connect>UserApi for UserApiClient<C> {
-    fn create_user(&self, body: ::models::User) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
+    fn create_user(&self, body: crate::models::User) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Post, "/user".to_string())
             .with_body_param(body)
             .returns_nothing()
             .execute(self.configuration.borrow())
     }
 
-    fn create_users_with_array_input(&self, body: Vec<::models::User>) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
+    fn create_users_with_array_input(&self, body: Vec<crate::models::User>) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Post, "/user/createWithArray".to_string())
             .with_body_param(body)
             .returns_nothing()
             .execute(self.configuration.borrow())
     }
 
-    fn create_users_with_list_input(&self, body: Vec<::models::User>) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
+    fn create_users_with_list_input(&self, body: Vec<crate::models::User>) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Post, "/user/createWithList".to_string())
             .with_body_param(body)
             .returns_nothing()
@@ -71,7 +71,7 @@ impl<C: hyper::client::Connect>UserApi for UserApiClient<C> {
             .execute(self.configuration.borrow())
     }
 
-    fn get_user_by_name(&self, username: &str) -> Box<Future<Item = ::models::User, Error = Error<serde_json::Value>>> {
+    fn get_user_by_name(&self, username: &str) -> Box<Future<Item = crate::models::User, Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Get, "/user/{username}".to_string())
             .with_path_param("username".to_string(), username.to_string())
             .execute(self.configuration.borrow())
@@ -90,7 +90,7 @@ impl<C: hyper::client::Connect>UserApi for UserApiClient<C> {
             .execute(self.configuration.borrow())
     }
 
-    fn update_user(&self, username: &str, body: ::models::User) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
+    fn update_user(&self, username: &str, body: crate::models::User) -> Box<Future<Item = (), Error = Error<serde_json::Value>>> {
         __internal_request::Request::new(hyper::Method::Put, "/user/{username}".to_string())
             .with_path_param("username".to_string(), username.to_string())
             .with_body_param(body)
diff --git a/samples/client/petstore/rust/src/models/api_response.rs b/samples/client/petstore/rust/src/models/api_response.rs
index 7884fba590e..814483602dd 100644
--- a/samples/client/petstore/rust/src/models/api_response.rs
+++ b/samples/client/petstore/rust/src/models/api_response.rs
@@ -10,9 +10,6 @@
 
 /// ApiResponse : Describes the result of uploading an image resource
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct ApiResponse {
diff --git a/samples/client/petstore/rust/src/models/category.rs b/samples/client/petstore/rust/src/models/category.rs
index 804f9f4c707..8cb5797ee1c 100644
--- a/samples/client/petstore/rust/src/models/category.rs
+++ b/samples/client/petstore/rust/src/models/category.rs
@@ -10,9 +10,6 @@
 
 /// Category : A category for a pet
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Category {
diff --git a/samples/client/petstore/rust/src/models/order.rs b/samples/client/petstore/rust/src/models/order.rs
index 118dc310767..24ad342497a 100644
--- a/samples/client/petstore/rust/src/models/order.rs
+++ b/samples/client/petstore/rust/src/models/order.rs
@@ -10,9 +10,6 @@
 
 /// Order : An order for a pets from the pet store
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Order {
diff --git a/samples/client/petstore/rust/src/models/pet.rs b/samples/client/petstore/rust/src/models/pet.rs
index 64dae06e454..e3c61239cdc 100644
--- a/samples/client/petstore/rust/src/models/pet.rs
+++ b/samples/client/petstore/rust/src/models/pet.rs
@@ -10,22 +10,19 @@
 
 /// Pet : A pet for sale in the pet store
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Pet {
     #[serde(rename = "id", skip_serializing_if = "Option::is_none")]
     pub id: Option<i64>,
     #[serde(rename = "category", skip_serializing_if = "Option::is_none")]
-    pub category: Option<::models::Category>,
+    pub category: Option<crate::models::Category>,
     #[serde(rename = "name")]
     pub name: String,
     #[serde(rename = "photoUrls")]
     pub photo_urls: Vec<String>,
     #[serde(rename = "tags", skip_serializing_if = "Option::is_none")]
-    pub tags: Option<Vec<::models::Tag>>,
+    pub tags: Option<Vec<crate::models::Tag>>,
     /// pet status in the store
     #[serde(rename = "status", skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
diff --git a/samples/client/petstore/rust/src/models/tag.rs b/samples/client/petstore/rust/src/models/tag.rs
index 503fb7f61bd..c7cbdf2cc05 100644
--- a/samples/client/petstore/rust/src/models/tag.rs
+++ b/samples/client/petstore/rust/src/models/tag.rs
@@ -10,9 +10,6 @@
 
 /// Tag : A tag for a pet
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Tag {
diff --git a/samples/client/petstore/rust/src/models/user.rs b/samples/client/petstore/rust/src/models/user.rs
index 6bfa6e2167a..e54ed701306 100644
--- a/samples/client/petstore/rust/src/models/user.rs
+++ b/samples/client/petstore/rust/src/models/user.rs
@@ -10,9 +10,6 @@
 
 /// User : A User who is purchasing from the pet store
 
-#[allow(unused_imports)]
-use serde_json::Value;
-
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct User {