diff --git a/dyndns/model/host.go b/dyndns/model/host.go
index fcd32ef..9a1d3a6 100644
--- a/dyndns/model/host.go
+++ b/dyndns/model/host.go
@@ -10,7 +10,7 @@ import (
 type Host struct {
 	gorm.Model
 	Hostname   string    `gorm:"unique_index:idx_host_domain;not null" form:"hostname" validate:"required,hostname"`
-	Domain     string    `gorm:"unique_index:idx_host_domain;not null" form:"domain" validate:"required,hostname"`
+	Domain     string    `gorm:"unique_index:idx_host_domain;not null" form:"domain" validate:"required,fqdn"`
 	Ip         string    `form:"ip" validate:"omitempty,ipv4|ipv6"`
 	Ttl        int       `form:"ttl" validate:"required,min=20,max=86400"`
 	LastUpdate time.Time `form:"lastupdate"`