diff --git a/.gitignore b/.gitignore
index a8014ff..32dbc5f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+.idea
+
 # Compiled Object files, Static and Dynamic libs (Shared Objects)
 *.o
 *.a
diff --git a/README.md b/README.md
index 6cac3e0..bce125e 100644
--- a/README.md
+++ b/README.md
@@ -2,30 +2,30 @@
 
 > Using Gin framework implementation OAuth 2.0 services
 
-[![License][License-Image]][License-Url] [![ReportCard][ReportCard-Image]][ReportCard-Url] [![GoDoc][GoDoc-Image]][GoDoc-Url]
+[![License][license-image]][license-url] [![ReportCard][reportcard-image]][reportcard-url] [![GoDoc][godoc-image]][godoc-url]
 
 ## Quick Start
 
 ### Download and install
 
-``` bash
+```bash
 $ go get -u github.com/go-oauth2/gin-server
 ```
 
 ### Create file `server.go`
 
-``` go
+```go
 package main
 
 import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/go-oauth2/gin-server"
-	"gopkg.in/oauth2.v3/manage"
-	"gopkg.in/oauth2.v3/models"
-	"gopkg.in/oauth2.v3/server"
-	"gopkg.in/oauth2.v3/store"
+	"gitee.ltd/go-oauth2/gin-server"
+	"github.com/go-oauth2/oauth2/v4/manage"
+	"github.com/go-oauth2/oauth2/v4/models"
+	"github.com/go-oauth2/oauth2/v4/server"
+	"github.com/go-oauth2/oauth2/v4/store"
 )
 
 func main() {
@@ -74,7 +74,7 @@ func main() {
 
 ### Build and run
 
-``` bash
+```bash
 $ go build server.go
 $ ./server
 ```
@@ -87,12 +87,12 @@ $ ./server
 http://localhost:9096/oauth2/token?grant_type=client_credentials&client_id=000000&client_secret=999999&scope=read
 ```
 
-``` json
+```json
 {
-    "access_token": "AJPNSQO2PCITABYX0RFLWG",
-    "expires_in": 7200,
-    "scope": "read",
-    "token_type": "Bearer"
+  "access_token": "AJPNSQO2PCITABYX0RFLWG",
+  "expires_in": 7200,
+  "scope": "read",
+  "token_type": "Bearer"
 }
 ```
 
@@ -102,21 +102,21 @@ http://localhost:9096/oauth2/token?grant_type=client_credentials&client_id=00000
 http://localhost:9096/api/test?access_token=AJPNSQO2PCITABYX0RFLWG
 ```
 
-``` json
+```json
 {
-    "ClientID": "000000",
-    "UserID": "",
-    "RedirectURI": "",
-    "Scope": "read",
-    "Code": "",
-    "CodeCreateAt": "0001-01-01T00:00:00Z",
-    "CodeExpiresIn": 0,
-    "Access": "AJPNSQO2PCITABYX0RFLWG",
-    "AccessCreateAt": "2016-11-29T09:00:52.617250916+08:00",
-    "AccessExpiresIn": 7200000000000,
-    "Refresh": "",
-    "RefreshCreateAt": "0001-01-01T00:00:00Z",
-    "RefreshExpiresIn": 0
+  "ClientID": "000000",
+  "UserID": "",
+  "RedirectURI": "",
+  "Scope": "read",
+  "Code": "",
+  "CodeCreateAt": "0001-01-01T00:00:00Z",
+  "CodeExpiresIn": 0,
+  "Access": "AJPNSQO2PCITABYX0RFLWG",
+  "AccessCreateAt": "2016-11-29T09:00:52.617250916+08:00",
+  "AccessExpiresIn": 7200000000000,
+  "Refresh": "",
+  "RefreshCreateAt": "0001-01-01T00:00:00Z",
+  "RefreshExpiresIn": 0
 }
 ```
 
@@ -126,9 +126,9 @@ http://localhost:9096/api/test?access_token=AJPNSQO2PCITABYX0RFLWG
 Copyright (c) 2016 Lyric
 ```
 
-[License-Url]: http://opensource.org/licenses/MIT
-[License-Image]: https://img.shields.io/npm/l/express.svg
-[ReportCard-Url]: https://goreportcard.com/report/github.com/go-oauth2/gin-server
-[ReportCard-Image]: https://goreportcard.com/badge/github.com/go-oauth2/gin-server
-[GoDoc-Url]: https://godoc.org/github.com/go-oauth2/gin-server
-[GoDoc-Image]: https://godoc.org/github.com/go-oauth2/gin-server?status.svg
+[license-url]: http://opensource.org/licenses/MIT
+[license-image]: https://img.shields.io/npm/l/express.svg
+[reportcard-url]: https://goreportcard.com/report/github.com/go-oauth2/gin-server
+[reportcard-image]: https://goreportcard.com/badge/github.com/go-oauth2/gin-server
+[godoc-url]: https://godoc.org/github.com/go-oauth2/gin-server
+[godoc-image]: https://godoc.org/github.com/go-oauth2/gin-server?status.svg
\ No newline at end of file
diff --git a/config.go b/config.go
index 0d2ac40..50886fc 100644
--- a/config.go
+++ b/config.go
@@ -1,8 +1,8 @@
 package ginserver
 
 import (
-	"gopkg.in/oauth2.v3"
-	"gopkg.in/oauth2.v3/server"
+	"github.com/go-oauth2/oauth2/v4"
+	"github.com/go-oauth2/oauth2/v4/server"
 )
 
 // SetTokenType token type
diff --git a/examples/server.go b/examples/server.go
index 13d2ebd..6abed62 100644
--- a/examples/server.go
+++ b/examples/server.go
@@ -1,14 +1,16 @@
 package main
 
 import (
+	ginserver "gin-server"
+
 	"net/http"
 
+	"gitee.ltd/go-oauth2/gin-server"
 	"github.com/gin-gonic/gin"
-	"github.com/go-oauth2/gin-server"
-	"gopkg.in/oauth2.v3/manage"
-	"gopkg.in/oauth2.v3/models"
-	"gopkg.in/oauth2.v3/server"
-	"gopkg.in/oauth2.v3/store"
+	"github.com/go-oauth2/oauth2/v4/manage"
+	"github.com/go-oauth2/oauth2/v4/models"
+	"github.com/go-oauth2/oauth2/v4/server"
+	"github.com/go-oauth2/oauth2/v4/store"
 )
 
 func main() {
diff --git a/server.go b/server.go
index 927a820..db3de10 100644
--- a/server.go
+++ b/server.go
@@ -5,8 +5,8 @@ import (
 	"sync"
 
 	"github.com/gin-gonic/gin"
-	"gopkg.in/oauth2.v3"
-	"gopkg.in/oauth2.v3/server"
+	"github.com/go-oauth2/oauth2/v4"
+	"github.com/go-oauth2/oauth2/v4/server"
 )
 
 var (