diff --git a/Source/FikaAmazonAPI.SampleCode/FulFillmentInboundv20240320Sample .cs b/Source/FikaAmazonAPI.SampleCode/FulFillmentInboundv20240320Sample .cs
index b17b476e..d2d49b66 100644
--- a/Source/FikaAmazonAPI.SampleCode/FulFillmentInboundv20240320Sample .cs	
+++ b/Source/FikaAmazonAPI.SampleCode/FulFillmentInboundv20240320Sample .cs	
@@ -17,7 +17,7 @@ public void CreateShipmentPlan()
             oCreateInboundShipmentPlanRequest.DestinationMarketplaces = new List<string> {amazonConnection.GetCurrentMarketplace.ID};
 
 
-            oCreateInboundShipmentPlanRequest.SourceAddress = new FikaAmazonAPI.AmazonSpApiSDK.Models.FulfillmentInboundv20240320.Address();
+            oCreateInboundShipmentPlanRequest.SourceAddress = new FikaAmazonAPI.AmazonSpApiSDK.Models.FulfillmentInboundv20240320.AddressInput();
             oCreateInboundShipmentPlanRequest.SourceAddress.AddressLine1 = "Add";
             oCreateInboundShipmentPlanRequest.SourceAddress.AddressLine2 = "ADD2";
             oCreateInboundShipmentPlanRequest.SourceAddress.City = "City";
diff --git a/Source/FikaAmazonAPI/Utils/Country.cs b/Source/FikaAmazonAPI/Utils/Country.cs
index 2b4d364a..3b73568a 100644
--- a/Source/FikaAmazonAPI/Utils/Country.cs
+++ b/Source/FikaAmazonAPI/Utils/Country.cs
@@ -1,7 +1,12 @@
-namespace FikaAmazonAPI.Utils
+using System.Text.Json.Serialization;
+
+namespace FikaAmazonAPI.Utils
 {
     public class Country
     {
+        [JsonConstructorAttribute]
+        public Country() { }
+
         public string Code { get; set; }
         public string Name { get; set; }
         public string SellercentralURL { get; set; }
diff --git a/Source/FikaAmazonAPI/Utils/MarketPlace.cs b/Source/FikaAmazonAPI/Utils/MarketPlace.cs
index 9f35c617..fb406d15 100644
--- a/Source/FikaAmazonAPI/Utils/MarketPlace.cs
+++ b/Source/FikaAmazonAPI/Utils/MarketPlace.cs
@@ -1,6 +1,7 @@
 using FikaAmazonAPI.AmazonSpApiSDK.Models.Exceptions;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.Json.Serialization;
 using static FikaAmazonAPI.ConstructFeed.BaseXML;
 
 namespace FikaAmazonAPI.Utils
@@ -22,6 +23,9 @@ private MarketPlace(string id, Region region, Country country, BaseCurrencyCode
             CurrencyCode = currencyCode;
         }
 
+        [JsonConstructorAttribute]
+        public MarketPlace() { }
+
         public static MarketPlace GetMarketPlaceByID(string id)
         {
             var list = new List<MarketPlace>();
diff --git a/Source/FikaAmazonAPI/Utils/Region.cs b/Source/FikaAmazonAPI/Utils/Region.cs
index 9e0ac687..2e28af2f 100644
--- a/Source/FikaAmazonAPI/Utils/Region.cs
+++ b/Source/FikaAmazonAPI/Utils/Region.cs
@@ -1,7 +1,12 @@
-namespace FikaAmazonAPI.Utils
+using System.Text.Json.Serialization;
+
+namespace FikaAmazonAPI.Utils
 {
     public class Region
     {
+        [JsonConstructorAttribute]
+        public Region() { }
+
         private Region(string regionName, string hostUrl, string sandboxHostUrl)
         {
             RegionName = regionName;