diff --git a/cmd/model/contract.go b/cmd/model/contract.go
index 5ba1ee1..5430ed9 100644
--- a/cmd/model/contract.go
+++ b/cmd/model/contract.go
@@ -7,7 +7,7 @@ type Contract struct {
 	ID            int32  `gorm:"column:id;type:int(11);primary_key;AUTO_INCREMENT" json:"id"`
 	Uid           string `gorm:"column:uid;type:varchar(100);comment:合同表的唯一表示;NOT NULL" json:"uid"`
 	ArtistUid     string `gorm:"column:artist_uid;type:varchar(100);comment:画家uid;NOT NULL" json:"artist_uid"`
-	ArtworkUid    string `gorm:"column:artwork_uid;type:varchar(100);comment:画作uid" json:"artwork_uid"`
+	ArtworkUid    string `gorm:"column:artwork_uid;type:varchar(1000);comment:画作uid" json:"artwork_uid"`
 	ContractId    string `gorm:"column:contract_id;type:varchar(100);comment:合同id" json:"contract_id"`
 	TransactionId string `gorm:"column:transaction_id;type:varchar(100);comment:交易id" json:"transaction_id"`
 	Type          int32  `gorm:"column:type;type:int(1);comment:合同类型;NOT NULL" json:"type"`