diff --git a/model/User.go b/model/User.go
index a3af909..ae8b35f 100644
--- a/model/User.go
+++ b/model/User.go
@@ -2,7 +2,7 @@ package model
 
 type User struct {
 	Model
-	Phone   int    `gorm:"not null;unique;type:bigint"`
-	Email   string `gorm:"unique"`
-	Servers  []Server `gorm:"ForeignKey:BindUser"`
+	Phone   int      `gorm:"not null;unique;type:bigint"`
+	Email   *string  `gorm:"unique"`
+	Servers []Server `gorm:"ForeignKey:BindUser"`
 }