diff --git a/internal/domain/list.go b/internal/domain/list.go
index 283ff0d..b711652 100644
--- a/internal/domain/list.go
+++ b/internal/domain/list.go
@@ -7,9 +7,10 @@ import (
 )
 
 type List struct {
-	ID        string    `json:"id"`
-	Name      string    `json:"name"`
-	CreatedAt time.Time `json:"created_at"`
+	ID         string    `json:"id"`
+	Name       string    `json:"name"`
+	CreatedAt  time.Time `json:"created_at"`
+	ModifiedAt time.Time `json:"modified_at"`
 }
 
 type ListRepository interface {
diff --git a/internal/repository/list.go b/internal/repository/list.go
index fede32b..f7fb7a4 100644
--- a/internal/repository/list.go
+++ b/internal/repository/list.go
@@ -32,9 +32,9 @@ func (r *ListRepo) CreateList(ctx context.Context, name string, userIDs []string
 	list := &domain.List{Name: name}
 
 	err = tx.QueryRowContext(ctx,
-		"INSERT INTO lists (name) VALUES ($1) RETURNING id, created_at",
+		"INSERT INTO lists (name) VALUES ($1) RETURNING id, created_at, modified_at",
 		name,
-	).Scan(&list.ID, &list.CreatedAt)
+	).Scan(&list.ID, &list.CreatedAt, &list.ModifiedAt)
 	if err != nil {
 		return nil, fmt.Errorf("failed to insert list: %w", err)
 	}