diff --git a/server/wheelserver/api/v1/inapp_shop/inapp_shop.go b/server/wheelserver/api/v1/inapp_shop/inapp_shop.go
index 090b5365..0d6d10ef 100644
--- a/server/wheelserver/api/v1/inapp_shop/inapp_shop.go
+++ b/server/wheelserver/api/v1/inapp_shop/inapp_shop.go
@@ -3,6 +3,7 @@ package inapp_shop
 import (
 	"crypto/hmac"
 	"crypto/sha256"
+	"encoding/hex"
 	"f5"
 	"main/common"
 	"main/constant"
@@ -119,7 +120,7 @@ func (this *InAppShopApi) Callback(c *gin.Context) {
 	mac := hmac.New(sha256.New, []byte(secret))
 	_, _ = mac.Write([]byte(strb.String()))
 
-	sign := string(mac.Sum(nil))
+	sign := hex.EncodeToString(mac.Sum(nil))
 	if strings.EqualFold(strings.ToLower(sign), strings.ToLower(reqObj.Signature)) {
 		f5.RspErr(c, 401, "invalid sign")
 		return