diff --git a/pkg/models/source.go b/pkg/models/source.go
index aa90bbb..be62f2e 100644
--- a/pkg/models/source.go
+++ b/pkg/models/source.go
@@ -4,7 +4,7 @@ package models
 type Source struct {
 	BaseModel[SourceID]
 	DisplayName string          `json:"display_name" `
-	Domain      string          `json:"domain" gorm:"not null;unique"`
+	Domain      SourceDomain    `json:"domain" gorm:"not null;unique"`
 	Icon        string          `json:"icon" gorm:"not null"`
 	UserSources []UserSource    `json:"-" gorm:"foreignKey:SourceID"`
 	References  []PostReference `json:"references" gorm:"foreignKey:SourceID"`