diff --git a/server/wheelserver/api/v1/inapp_shop/inapp_shop.go b/server/wheelserver/api/v1/inapp_shop/inapp_shop.go
index 74cbcfe7..996f61e1 100644
--- a/server/wheelserver/api/v1/inapp_shop/inapp_shop.go
+++ b/server/wheelserver/api/v1/inapp_shop/inapp_shop.go
@@ -99,7 +99,7 @@ func (this *InAppShopApi) Callback(c *gin.Context) {
 		return
 	}
 
-	keys := make([]string, len(reqObj.Records))
+	keys := []string{}
 	rec := reqObj.Records[0]
 	for k := range rec {
 		keys = append(keys, k)