diff --git a/Extensions/Json/Cosmos.DataTransfer.JsonExtension.UnitTests/JsonDictionaryDataItemTest.cs b/Extensions/Json/Cosmos.DataTransfer.JsonExtension.UnitTests/JsonDictionaryDataItemTest.cs
new file mode 100644
index 0000000..3d539c4
--- /dev/null
+++ b/Extensions/Json/Cosmos.DataTransfer.JsonExtension.UnitTests/JsonDictionaryDataItemTest.cs
@@ -0,0 +1,29 @@
+using Cosmos.DataTransfer.Interfaces;
+using Microsoft.Extensions.Logging.Abstractions;
+using Newtonsoft.Json;
+
+namespace Cosmos.DataTransfer.JsonExtension.UnitTests
+{
+    [TestClass]
+    public class JsonDictionaryDataItemTest
+    {
+        [TestMethod]
+        public void ConvertNumber()
+        {
+            var data = new Dictionary<string, object?>
+            {
+                { "integer", 1 },
+                { "long", int.MaxValue * 2L },
+                { "doubleAsNumber1", 1.0 },
+                { "doubleAsNumber2", 1.1 },
+            };
+
+            var output = new JsonDictionaryDataItem(data);
+
+            Assert.IsTrue(output.GetValue("integer")?.GetType() == typeof(int));
+            Assert.IsTrue(output.GetValue("long")?.GetType() == typeof(long));
+            Assert.IsTrue(output.GetValue("doubleAsNumber1")?.GetType() == typeof(double));
+            Assert.IsTrue(output.GetValue("doubleAsNumber2")?.GetType() == typeof(double));
+        }
+    }
+}
\ No newline at end of file
diff --git a/Extensions/Json/Cosmos.DataTransfer.JsonExtension.UnitTests/JsonSourceTests.cs b/Extensions/Json/Cosmos.DataTransfer.JsonExtension.UnitTests/JsonSourceTests.cs
index b6f4022..60d3e32 100644
--- a/Extensions/Json/Cosmos.DataTransfer.JsonExtension.UnitTests/JsonSourceTests.cs
+++ b/Extensions/Json/Cosmos.DataTransfer.JsonExtension.UnitTests/JsonSourceTests.cs
@@ -61,7 +61,7 @@ public async Task ReadAsync_WithSingleObjectFile_ReadsValues()
             {
                 counter++;
                 CollectionAssert.AreEquivalent(new[] { "id", "name" }, dataItem.GetFieldNames().ToArray());
-                Assert.IsInstanceOfType(dataItem.GetValue("id"), typeof(double));
+                Assert.IsInstanceOfType(dataItem.GetValue("id"), typeof(int));
                 Assert.IsNotNull(dataItem.GetValue("name"));
             }
 
@@ -85,9 +85,9 @@ public async Task ReadAsync_WithSingleObjectsFolder_ReadsValuesInOrder()
                 counter++;
                 CollectionAssert.AreEquivalent(new[] { "id", "name" }, dataItem.GetFieldNames().ToArray());
                 object? value = dataItem.GetValue("id");
-                Assert.IsInstanceOfType(value, typeof(double));
+                Assert.IsInstanceOfType(value, typeof(int));
                 Assert.IsNotNull(dataItem.GetValue("name"));
-                var current = (double?)value ?? int.MaxValue;
+                var current = (int?)value ?? int.MaxValue;
                 Assert.IsTrue(current > lastId);
                 lastId = current;
             }
@@ -109,7 +109,7 @@ public async Task ReadAsync_WithArraysFolder_ReadsValues()
             {
                 counter++;
                 CollectionAssert.AreEquivalent(new[] { "id", "name" }, dataItem.GetFieldNames().ToArray());
-                Assert.IsInstanceOfType(dataItem.GetValue("id"), typeof(double));
+                Assert.IsInstanceOfType(dataItem.GetValue("id"), typeof(int));
                 Assert.IsNotNull(dataItem.GetValue("name"));
             }
 
@@ -130,7 +130,7 @@ public async Task ReadAsync_WithMixedObjectsFolder_ReadsValues()
             {
                 counter++;
                 CollectionAssert.AreEquivalent(new[] { "id", "name" }, dataItem.GetFieldNames().ToArray());
-                Assert.IsInstanceOfType(dataItem.GetValue("id"), typeof(double));
+                Assert.IsInstanceOfType(dataItem.GetValue("id"), typeof(int));
                 Assert.IsNotNull(dataItem.GetValue("name"));
             }
 
diff --git a/Extensions/Json/Cosmos.DataTransfer.JsonExtension/JsonDictionaryDataItem.cs b/Extensions/Json/Cosmos.DataTransfer.JsonExtension/JsonDictionaryDataItem.cs
index d95e83e..e4fef0d 100644
--- a/Extensions/Json/Cosmos.DataTransfer.JsonExtension/JsonDictionaryDataItem.cs
+++ b/Extensions/Json/Cosmos.DataTransfer.JsonExtension/JsonDictionaryDataItem.cs
@@ -41,7 +41,13 @@ public IEnumerable<string> GetFieldNames()
                 case JsonValueKind.String:
                     return element.GetString();
                 case JsonValueKind.Number:
+                { 
+                    if (IsInteger(element.GetRawText()))
+                        return element.GetInt32();
+                    if (IsLong(element.GetRawText()))
+                        return element.GetInt64();
                     return element.GetDouble();
+                }
                 case JsonValueKind.True:
                     return true;
                 case JsonValueKind.False:
@@ -58,5 +64,15 @@ private static JsonDictionaryDataItem GetChildObject(JsonElement element)
         {
             return new JsonDictionaryDataItem(element.EnumerateObject().ToDictionary(p => p.Name, p => (object?)p.Value));
         }
+
+        private static bool IsInteger(string? value)
+        {
+            return int.TryParse(value, out _);
+        }
+
+        private static bool IsLong(string? value)
+        {
+            return long.TryParse(value, out _);
+        }
     }
 }
\ No newline at end of file