diff --git a/src/model/advertising_limit.go b/src/model/advertising_limit.go
index 1f946e6..46906ae 100644
--- a/src/model/advertising_limit.go
+++ b/src/model/advertising_limit.go
@@ -1,7 +1,7 @@
 package model
 
 type AdvertisingLimit struct {
-	Id          int    `json:"id" xorm:"not null pk INT(11)"`
+	Id          int    `json:"id" xorm:"not null pk autoincr INT(11)"`
 	Minute      int    `json:"minute" xorm:"default 0 INT(11)"`
 	ImeiNum     int    `json:"imei_num" xorm:"default 0 INT(11)"`
 	Tip         string `json:"tip" xorm:"VARCHAR(255)"`