diff --git a/fulfillment_orders.go b/fulfillment_orders.go
index dfd931a..0870c58 100644
--- a/fulfillment_orders.go
+++ b/fulfillment_orders.go
@@ -12,15 +12,15 @@ import (
 // FulfillmentOrdersReturn is to decode the json data
 type FulfillmentOrdersReturn struct {
 	FulfillmentOrders []struct {
-		Id                 int64    `json:"id"`
-		ShopId             int64    `json:"shop_id"`
-		OrderId            int64    `json:"order_id"`
-		AssignedLocationId int64    `json:"assigned_location_id"`
+		Id                 int      `json:"id"`
+		ShopId             int      `json:"shop_id"`
+		OrderId            int      `json:"order_id"`
+		AssignedLocationId int      `json:"assigned_location_id"`
 		RequestStatus      string   `json:"request_status"`
 		Status             string   `json:"status"`
 		SupportedActions   []string `json:"supported_actions"`
 		Destination        struct {
-			Id        int64       `json:"id"`
+			Id        int         `json:"id"`
 			Address1  string      `json:"address1"`
 			Address2  interface{} `json:"address2"`
 			City      string      `json:"city"`
@@ -34,21 +34,21 @@ type FulfillmentOrdersReturn struct {
 			Zip       string      `json:"zip"`
 		} `json:"destination"`
 		LineItems []struct {
-			Id                  int64 `json:"id"`
-			ShopId              int64 `json:"shop_id"`
-			FulfillmentOrderId  int64 `json:"fulfillment_order_id"`
-			Quantity            int   `json:"quantity"`
-			LineItemId          int64 `json:"line_item_id"`
-			InventoryItemId     int64 `json:"inventory_item_id"`
-			FulfillableQuantity int   `json:"fulfillable_quantity"`
-			VariantId           int64 `json:"variant_id"`
+			Id                  int `json:"id"`
+			ShopId              int `json:"shop_id"`
+			FulfillmentOrderId  int `json:"fulfillment_order_id"`
+			Quantity            int `json:"quantity"`
+			LineItemId          int `json:"line_item_id"`
+			InventoryItemId     int `json:"inventory_item_id"`
+			FulfillableQuantity int `json:"fulfillable_quantity"`
+			VariantId           int `json:"variant_id"`
 		} `json:"line_items"`
 		FulfillAt           time.Time     `json:"fulfill_at"`
 		FulfillBy           interface{}   `json:"fulfill_by"`
 		InternationalDuties interface{}   `json:"international_duties"`
 		FulfillmentHolds    []interface{} `json:"fulfillment_holds"`
 		DeliveryMethod      struct {
-			Id                  int64       `json:"id"`
+			Id                  int         `json:"id"`
 			MethodType          string      `json:"method_type"`
 			MinDeliveryDateTime interface{} `json:"min_delivery_date_time"`
 			MaxDeliveryDateTime interface{} `json:"max_delivery_date_time"`
@@ -60,7 +60,7 @@ type FulfillmentOrdersReturn struct {
 			Address2    interface{} `json:"address2"`
 			City        string      `json:"city"`
 			CountryCode string      `json:"country_code"`
-			LocationId  int64       `json:"location_id"`
+			LocationId  int         `json:"location_id"`
 			Name        string      `json:"name"`
 			Phone       string      `json:"phone"`
 			Province    interface{} `json:"province"`
diff --git a/fulfillments.go b/fulfillments.go
index ce91da8..8c1e5e0 100644
--- a/fulfillments.go
+++ b/fulfillments.go
@@ -27,33 +27,33 @@ type FulfillmentsBodyTrackingInfo struct {
 }
 
 type FulfillmentsBodyLineItemsByFulfillmentOrder struct {
-	FulfillmentOrderId        int64         `json:"fulfillment_order_id"`
+	FulfillmentOrderId        int           `json:"fulfillment_order_id"`
 	FulfillmentOrderLineItems []interface{} `json:"fulfillment_order_line_items"`
 }
 
 // FulfillmentsReturn is to decode the json data
 type FulfillmentsReturn struct {
 	Fulfillment struct {
-		Id              int64       `json:"id"`
-		OrderId         int64       `json:"order_id"`
+		Id              int         `json:"id"`
+		OrderId         int         `json:"order_id"`
 		Status          string      `json:"status"`
 		CreatedAt       time.Time   `json:"created_at"`
 		Service         string      `json:"service"`
 		UpdatedAt       time.Time   `json:"updated_at"`
 		TrackingCompany string      `json:"tracking_company"`
 		ShipmentStatus  interface{} `json:"shipment_status"`
-		LocationId      int64       `json:"location_id"`
+		LocationId      int         `json:"location_id"`
 		OriginAddress   interface{} `json:"origin_address"`
 		LineItems       []struct {
-			Id                         int64         `json:"id"`
-			VariantId                  int64         `json:"variant_id"`
+			Id                         int           `json:"id"`
+			VariantId                  int           `json:"variant_id"`
 			Title                      string        `json:"title"`
 			Quantity                   int           `json:"quantity"`
 			Sku                        string        `json:"sku"`
 			VariantTitle               string        `json:"variant_title"`
 			Vendor                     string        `json:"vendor"`
 			FulfillmentService         string        `json:"fulfillment_service"`
-			ProductId                  int64         `json:"product_id"`
+			ProductId                  int           `json:"product_id"`
 			RequiresShipping           bool          `json:"requires_shipping"`
 			Taxable                    bool          `json:"taxable"`
 			GiftCard                   bool          `json:"gift_card"`