diff --git a/http/basket.go b/http/basket.go
index 32741c1..3d1e268 100644
--- a/http/basket.go
+++ b/http/basket.go
@@ -10,7 +10,7 @@ type GetBasketResponse struct {
 	ID        string        `json:"id"`
 	State     string        `json:"state"`
 	CreatedAt time.Duration `json:"created_at"`
-	UpdatedAt time.Duration `json:"updated_at"`
+	UpdatedAt time.Duration `json:"updated_at,omitempty"`
 }
 
 type GetBasketItemsRequest struct {
@@ -23,7 +23,7 @@ type GetBasketItemsResponse struct {
 	Quantity  int           `json:"quantity"`
 	Price     float64       `json:"price"`
 	CreatedAt time.Duration `json:"created_at"`
-	UpdatedAt time.Duration `json:"updated_at"`
+	UpdatedAt time.Duration `json:"updated_at,omitempty"`
 }
 
 type BasketCheckoutRequest struct {