diff --git a/miniprogram/redpacketcover/redpacketcover.go b/miniprogram/redpacketcover/redpacketcover.go
index e586db4..08e00bf 100644
--- a/miniprogram/redpacketcover/redpacketcover.go
+++ b/miniprogram/redpacketcover/redpacketcover.go
@@ -1,9 +1,7 @@
 package redpacketcover
 
 import (
-	"encoding/json"
 	"fmt"
-	"strings"
 
 	"github.com/silenceper/wechat/v2/miniprogram/context"
 	"github.com/silenceper/wechat/v2/util"
@@ -25,45 +23,37 @@ func NewRedPacketCover(context *context.Context) *RedPacketCover {
 	return redPacketCover
 }
 
-// CoverParma 小程序码参数
-type CoverParma struct {
+// GetRedPacketCoverRequest 获取微信红包封面参数
+type GetRedPacketCoverRequest struct {
 	// openid 可领取用户的openid
 	OpenID string `json:"openid"`
 	// ctoken 在红包封面平台获取发放ctoken（需要指定可以发放的appid）
 	CToken string `json:"ctoken"`
 }
 
-// fetchCode 请求并返回二维码二进制数据
-func (qrCode *RedPacketCover) fetchCode(urlStr string, body interface{}) (response []byte, err error) {
-	var accessToken string
-	accessToken, err = qrCode.GetAccessToken()
-	if err != nil {
-		return
-	}
-
-	urlStr = fmt.Sprintf(urlStr, accessToken)
-	var contentType string
-	response, contentType, err = util.PostJSONWithRespContentType(urlStr, body)
-	if err != nil {
-		return
-	}
-	if strings.HasPrefix(contentType, "application/json") {
-		// 返回错误信息
-		var result util.CommonError
-		err = json.Unmarshal(response, &result)
-		if err == nil && result.ErrCode != 0 {
-			err = fmt.Errorf("error : errcode=%v , errmsg=%v", result.ErrCode, result.ErrMsg)
-			return nil, err
-		}
-
-		return response, nil
-	}
-	err = fmt.Errorf("error : unknown response content type - %v", contentType)
-	return nil, err
+// GetRedPacketCoverResp 获取微信红包封面
+type GetRedPacketCoverResp struct {
+	util.CommonError
+	Data struct {
+		URL string `json:"url"`
+	} `json:"data"` // 唯一请求标识
 }
 
 // GetRedPacketCoverURL 获得指定用户可以领取的红包封面链接。获取参数ctoken参考微信红包封面开放平台
 // 文档地址： https://developers.weixin.qq.com/miniprogram/dev/OpenApiDoc/red-packet-cover/getRedPacketCoverUrl.html
-func (qrCode *RedPacketCover) GetRedPacketCoverURL(coderParams CoverParma) (response []byte, err error) {
-	return qrCode.fetchCode(getRedPacketCoverURL, coderParams)
+func (cover *RedPacketCover) GetRedPacketCoverURL(coderParams GetRedPacketCoverRequest) (res GetRedPacketCoverResp, err error) {
+	accessToken, err := cover.GetAccessToken()
+	if err != nil {
+		return
+	}
+
+	uri := fmt.Sprintf(getRedPacketCoverURL, accessToken)
+	response, err := util.PostJSON(uri, coderParams)
+	if err != nil {
+		return
+	}
+
+	// 使用通用方法返回错误
+	err = util.DecodeWithError(response, &res, "GetRedPacketCoverURL")
+	return
 }