diff --git a/README.md b/README.md
index dd0d781ad..53232f6b7 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,8 @@
 
 [![Language](https://img.shields.io/badge/Language-Go-blue.svg)](https://golang.org/)
 [![Build Status](https://github.com/go-kratos/kratos/workflows/Go/badge.svg)](https://github.com/go-kratos/kratos/actions)
-[![GoDoc](https://godoc.org/github.com/go-kratos/kratos?status.svg)](https://godoc.org/github.com/go-kratos/kratos)
-[![Go Report Card](https://goreportcard.com/badge/github.com/go-kratos/kratos)](https://goreportcard.com/report/github.com/go-kratos/kratos)
+[![GoDoc](https://pkg.go.dev/badge/github.com/go-kratos/kratos/v2)](https://pkg.go.dev/github.com/go-kratos/kratos/v2)
+[![Go Report Card](https://goreportcard.com/badge/github.com/go-kratos/kratos/v2)](https://goreportcard.com/report/github.com/go-kratos/kratos/v2)
 [![Discord](https://img.shields.io/discord/766619759214854164?label=chat&logo=discord)](https://discord.gg/BWzJsUJ)
 
 # Kratos
@@ -48,9 +48,9 @@ Kratos 一套轻量级 Go 微服务框架，包含大量微服务相关框架及
 ### Install Kratos
 ```
 # 安装生成工具
-go get github.com/go-kratos/kratos/cmd/kratos
-go get github.com/go-kratos/kratos/cmd/protoc-gen-go-http
-go get github.com/go-kratos/kratos/cmd/protoc-gen-go-errors
+go get github.com/go-kratos/kratos/cmd/kratos/v2
+go get github.com/go-kratos/kratos/cmd/protoc-gen-go-http/v2
+go get github.com/go-kratos/kratos/cmd/protoc-gen-go-errors/v2
 
 # 或者通过 Source 安装
 cd cmd/kratos && go install
diff --git a/config/config.go b/config/config.go
index 15ef8e678..cf3f07d34 100644
--- a/config/config.go
+++ b/config/config.go
@@ -7,6 +7,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/go-kratos/kratos/v2/encoding"
 	"github.com/go-kratos/kratos/v2/log"
 )
 
@@ -17,6 +18,8 @@ var (
 	ErrTypeAssert = errors.New("type assert error")
 
 	_ Config = (*config)(nil)
+
+	codec = encoding.GetCodec("json")
 )
 
 // Observer is config observer.
@@ -120,7 +123,7 @@ func (c *config) Scan(v interface{}) error {
 	if err != nil {
 		return err
 	}
-	return json.Unmarshal(data, v)
+	return codec.Unmarshal(data, v)
 }
 
 func (c *config) Watch(key string, o Observer) error {
diff --git a/config/reader.go b/config/reader.go
index de6c24bc5..601557eeb 100644
--- a/config/reader.go
+++ b/config/reader.go
@@ -1,7 +1,6 @@
 package config
 
 import (
-	"encoding/json"
 	"fmt"
 	"strings"
 
@@ -72,16 +71,16 @@ func (r *reader) Value(path string) (Value, bool) {
 }
 
 func (r *reader) Source() ([]byte, error) {
-	return json.Marshal(r.values)
+	return codec.Marshal(r.values)
 }
 
 func cloneMap(src map[string]interface{}) (map[string]interface{}, error) {
-	data, err := json.Marshal(src)
+	data, err := codec.Marshal(src)
 	if err != nil {
 		return nil, err
 	}
 	dst := make(map[string]interface{})
-	if err = json.Unmarshal(data, &dst); err != nil {
+	if err = codec.Unmarshal(data, &dst); err != nil {
 		return nil, err
 	}
 	return dst, nil