diff --git a/model/user.go b/model/user.go
index 06cf685c..b941c164 100644
--- a/model/user.go
+++ b/model/user.go
@@ -13,8 +13,8 @@ import (
 // Otherwise, the sensitive information will be saved on local storage in plain text!
 type User struct {
 	Id               int    `json:"id"`
-	Username         string `json:"username" gorm:"unique;index" validate:"max=12"`
-	Password         string `json:"password" gorm:"not null;" validate:"min=8,max=20"`
+	Username         string `json:"username" gorm:"unique;index" validate:"max=30"`
+	Password         string `json:"password" gorm:"not null;" validate:"min=8,max=30"`
 	DisplayName      string `json:"display_name" gorm:"index" validate:"max=20"`
 	Role             int    `json:"role" gorm:"type:int;default:1"`   // admin, common
 	Status           int    `json:"status" gorm:"type:int;default:1"` // enabled, disabled