diff --git a/README.md b/README.md
index bc16250..c666cc0 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [![Github](https://img.shields.io/github/followers/iGoogle-ink?label=Follow&style=social)](https://github.com/iGoogle-ink)
 [![Github](https://img.shields.io/github/forks/go-pay/wechat-sdk?label=Fork&style=social)](https://github.com/go-pay/wechat-sdk/fork)
 
-[![Golang](https://img.shields.io/badge/golang-1.18-brightgreen.svg)](https://golang.google.cn)
+[![Golang](https://img.shields.io/badge/golang-1.21-brightgreen.svg)](https://golang.google.cn)
 [![GoDoc](https://img.shields.io/badge/doc-pkg.go.dev-informational.svg)](https://pkg.go.dev/github.com/go-pay/wechat-sdk)
 [![Go](https://github.com/go-pay/wechat-sdk/actions/workflows/go.yml/badge.svg)](https://github.com/go-pay/wechat-sdk/actions/workflows/go.yml)
 [![GitHub Release](https://img.shields.io/github/v/release/go-pay/wechat-sdk)](https://github.com/go-pay/wechat-sdk/releases)
@@ -26,11 +26,11 @@ go get -u github.com/go-pay/wechat-sdk
 ```go
 import (
     "github.com/go-pay/wechat-sdk"
-    "github.com/go-pay/wechat-sdk/pkg/xlog"
+    "github.com/go-pay/xlog"
 )
 
 func main() {
-    xlog.Info("Wechat-SDK Version: ", wechat.Version)
+    xlog.Warn("Wechat-SDK Version: ", wechat.Version)
 }
 ```
 
@@ -78,4 +78,4 @@ QQ群：
 > [GoLand](https://www.jetbrains.com/go/?from=gopay) A Go IDE with extended support for JavaScript, TypeScript, and databases。
 > 
 特别感谢 [JetBrains](https://www.jetbrains.com/?from=gopay) 为开源项目提供免费的 [GoLand](https://www.jetbrains.com/go/?from=gopay) 等 IDE 的授权  
-[<img src=".github/jetbrains-variant-3.png" width="200"/>](https://www.jetbrains.com/?from=gopay)
\ No newline at end of file
+[<img src=".github/jetbrains-variant-3.png" width="200"/>](https://www.jetbrains.com/?from=gopay)
diff --git a/pkg/util/convert.go b/pkg/util/convert.go
index 537074d..1e708d9 100644
--- a/pkg/util/convert.go
+++ b/pkg/util/convert.go
@@ -2,7 +2,6 @@ package util
 
 import (
 	"math"
-	"reflect"
 	"strconv"
 	"strings"
 	"unsafe"
@@ -92,9 +91,5 @@ func BinaryToDecimal(bit string) (num int) {
 
 // BytesToString 0 拷贝转换 slice byte 为 string
 func BytesToString(b []byte) (s string) {
-	_bptr := (*reflect.SliceHeader)(unsafe.Pointer(&b))
-	_sptr := (*reflect.StringHeader)(unsafe.Pointer(&s))
-	_sptr.Data = _bptr.Data
-	_sptr.Len = _bptr.Len
-	return s
+	return *(*string)(unsafe.Pointer(&b))
 }
diff --git a/pkg/xhttp/client.go b/pkg/xhttp/client.go
index 60d4113..d25bc6f 100644
--- a/pkg/xhttp/client.go
+++ b/pkg/xhttp/client.go
@@ -9,7 +9,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime/multipart"
 	"net/http"
 	"net/url"
@@ -304,7 +303,7 @@ func (c *Client) EndBytes(ctx context.Context) (res *http.Response, bs []byte, e
 			return err
 		}
 		defer res.Body.Close()
-		bs, err = ioutil.ReadAll(io.LimitReader(res.Body, int64(5<<20))) // default 5MB change the size you want
+		bs, err = io.ReadAll(io.LimitReader(res.Body, int64(5<<20))) // default 5MB change the size you want
 		if err != nil {
 			return err
 		}
diff --git a/pkg/xhttp/client_test.go b/pkg/xhttp/client_test.go
index f12d8a9..15a77c5 100644
--- a/pkg/xhttp/client_test.go
+++ b/pkg/xhttp/client_test.go
@@ -2,7 +2,7 @@ package xhttp
 
 import (
 	"context"
-	"io/ioutil"
+	"os"
 	"testing"
 	"time"
 
@@ -40,7 +40,7 @@ func TestHttpGet(t *testing.T) {
 }
 
 func TestHttpUploadFile(t *testing.T) {
-	fileContent, err := ioutil.ReadFile("../../logo.png")
+	fileContent, err := os.ReadFile("../../logo.png")
 	if err != nil {
 		xlog.Error(err)
 		return