diff --git a/characteristics.go b/characteristics.go
index efa2608..5a7d7b3 100644
--- a/characteristics.go
+++ b/characteristics.go
@@ -20,6 +20,7 @@ type CharacteristicBase struct {
 	Id                   int64     `json:"id,omitempty"`
 	CharacteristicName   string    `db:"characteristic_name" json:"characteristicName"`
 	CharacteristicTypeId int64     `db:"characteristic_type_id" json:"-"`
+	Sort                 NullInt64 `db:"sort" json:"sort"`
 	CreatedAt            time.Time `db:"created_at" json:"createdAt"`
 	UpdatedAt            time.Time `db:"updated_at" json:"updatedAt"`
 	DeletedAt            NullTime  `db:"deleted_at" json:"deletedAt"`
diff --git a/migrations/00006_AddCharacteristics_up.sql b/migrations/00006_AddCharacteristics_up.sql
index 86802cb..1c369e8 100644
--- a/migrations/00006_AddCharacteristics_up.sql
+++ b/migrations/00006_AddCharacteristics_up.sql
@@ -5,6 +5,7 @@ CREATE TABLE characteristics (
     id BIGSERIAL NOT NULL,
     characteristic_name TEXT NOT NULL,
     characteristic_type_id BIGINT NOT NULL,
+    sort BIGINT NULL,
 
     created_at TIMESTAMP WITH TIME ZONE NOT NULL,
     updated_at TIMESTAMP WITH TIME ZONE NOT NULL,