diff --git a/integration_test.go b/integration_test.go
index bc3a573..6249f05 100644
--- a/integration_test.go
+++ b/integration_test.go
@@ -188,7 +188,7 @@ func TestCreatePayment(t *testing.T) {
 			ItemList: &ItemList{
 				Items: []Item{
 					Item{
-						Quantity: 2,
+						Quantity: "2",
 						Price:    "3.50",
 						Currency: "USD",
 						Name:     "Product 1",
@@ -251,7 +251,7 @@ func TestPatchPayment(t *testing.T) {
 			ItemList: &ItemList{
 				Items: []Item{
 					Item{
-						Quantity: 2,
+						Quantity: "2",
 						Price:    "3.50",
 						Currency: "USD",
 						Name:     "Product 1",
diff --git a/types.go b/types.go
index dbfa546..f22109a 100644
--- a/types.go
+++ b/types.go
@@ -288,7 +288,7 @@ type (
 
 	// Item struct
 	Item struct {
-		Quantity    int    `json:"quantity"`
+		Quantity    string `json:"quantity"`
 		Name        string `json:"name"`
 		Price       string `json:"price"`
 		Currency    string `json:"currency"`
diff --git a/unit_test.go b/unit_test.go
index bbfd71c..7062ad8 100644
--- a/unit_test.go
+++ b/unit_test.go
@@ -59,7 +59,7 @@ func TestTypeItem(t *testing.T) {
     "name":"Item",
     "price":"22.99",
     "currency":"GBP",
-    "quantity":1
+    "quantity":"1"
 }`
 
 	i := &Item{}
@@ -71,7 +71,7 @@ func TestTypeItem(t *testing.T) {
 	if i.Name != "Item" ||
 		i.Price != "22.99" ||
 		i.Currency != "GBP" ||
-		i.Quantity != 1 {
+		i.Quantity != "1" {
 		t.Errorf("Item decoded result is incorrect, Given: %v", i)
 	}
 }