diff --git a/mongo/mongo.go b/mongo/mongo.go
index 1318dfb..92f0c2a 100644
--- a/mongo/mongo.go
+++ b/mongo/mongo.go
@@ -99,7 +99,7 @@ func Delete(ctx context.Context, filter bson.M, collection string, opts ...optio
 }
 
 // Update 修改记录
-func Update(ctx context.Context, filter bson.M, update interface{}, collection string, opts ...options.Lister[options.UpdateManyOptions]) (result *mongo.UpdateResult, err error) {
+func Update(ctx context.Context, filter bson.M, update bson.M, collection string, opts ...options.Lister[options.UpdateManyOptions]) (result *mongo.UpdateResult, err error) {
 	if len(filter) == 0 {
 		err = gerror.New("缺少查询条件")
 		return
@@ -110,10 +110,11 @@ func Update(ctx context.Context, filter bson.M, update interface{}, collection s
 		return
 	}
 	filter["tenantId"] = user.TenantId
-	doc := gconv.Map(update)
-	doc["updater"] = user.UserName
-	doc["updatedAt"] = gtime.Now().Time
-	result, err = db.Collection(collection).UpdateMany(ctx, filter, doc, opts...)
+	setDoc := update["$set"].(bson.M)
+	setDoc["updater"] = user.UserName
+	setDoc["updatedAt"] = gtime.Now().Time
+	update = bson.M{"$set": setDoc}
+	result, err = db.Collection(collection).UpdateMany(ctx, filter, update, opts...)
 	if err != nil {
 		return
 	}