diff --git a/src/Core/Services/TypeHelper.cs b/src/Core/Services/TypeHelper.cs
index a0ba25a0ba..56b86b886c 100644
--- a/src/Core/Services/TypeHelper.cs
+++ b/src/Core/Services/TypeHelper.cs
@@ -3,6 +3,7 @@
 
 using System.Data;
 using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
 using System.Net;
 using Azure.DataApiBuilder.Core.Services.OpenAPI;
 using Azure.DataApiBuilder.Service.Exceptions;
@@ -304,12 +305,12 @@ public static bool TryGetDbTypeFromSqlDbDateTimeType(SqlDbType sqlDbType, [NotNu
             SyntaxKind valueKind = node.Kind;
             return valueKind switch
             {
-                SyntaxKind.IntValue => Convert.ToInt32(node.Value), // spec
-                SyntaxKind.FloatValue => Convert.ToDouble(node.Value), // spec
+                SyntaxKind.IntValue => Convert.ToInt32(node.Value, CultureInfo.InvariantCulture), // spec
+                SyntaxKind.FloatValue => Convert.ToDouble(node.Value, CultureInfo.InvariantCulture), // spec
                 SyntaxKind.BooleanValue => Convert.ToBoolean(node.Value), // spec
-                SyntaxKind.StringValue => Convert.ToString(node.Value), // spec
+                SyntaxKind.StringValue => Convert.ToString(node.Value, CultureInfo.InvariantCulture), // spec
                 SyntaxKind.NullValue => null, // spec
-                _ => Convert.ToString(node.Value)
+                _ => Convert.ToString(node.Value, CultureInfo.InvariantCulture)
             };
         }
 
diff --git a/src/Service.Tests/CosmosTests/MutationTests.cs b/src/Service.Tests/CosmosTests/MutationTests.cs
index 9cb68b4847..23e23a9ec7 100644
--- a/src/Service.Tests/CosmosTests/MutationTests.cs
+++ b/src/Service.Tests/CosmosTests/MutationTests.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Net.Http;
 using System.Text.Json;
@@ -1074,6 +1075,31 @@ public async Task CanPatchMoreThan10AttributesInAnItemWithVariables()
             Assert.AreEqual(patchResponse.GetProperty("moons").ToString(), JsonSerializer.Serialize(update.moons));
         }
 
+        [TestMethod]
+        [DataRow("en-US")]
+        [DataRow("en-DE")]
+        public async Task CanCreateItemWithCultureInvariant(string cultureInfo)
+        {
+            CultureInfo ci = new(cultureInfo);
+            CultureInfo.DefaultThreadCurrentCulture = ci;
+
+            // Run mutation Add planet;
+            string id = Guid.NewGuid().ToString();
+            const string name = "test_name";
+            string mutation = $@"
+mutation {{
+    createPlanet (item: {{ id: ""{id}"", name: ""{name}"", age: 10.15 }}) {{
+        id
+        name
+        age
+    }}
+}}";
+            JsonElement response = await ExecuteGraphQLRequestAsync("createPlanet", mutation, variables: new());
+
+            // Validate results
+            Assert.AreEqual(Convert.ToDouble(10.15, CultureInfo.InvariantCulture), response.GetProperty("age").GetDouble());
+        }
+
         /// <summary>
         /// Runs once after all tests in this class are executed
         /// </summary>
diff --git a/src/Service.Tests/CosmosTests/TestBase.cs b/src/Service.Tests/CosmosTests/TestBase.cs
index 12e881f52e..cce7bb09ea 100644
--- a/src/Service.Tests/CosmosTests/TestBase.cs
+++ b/src/Service.Tests/CosmosTests/TestBase.cs
@@ -46,7 +46,7 @@ type Planet @model(name:""PlanetAlias"") {
     id : ID!,
     name : String,
     character: Character,
-    age : Int,
+    age : Float,
     dimension : String,
     earth: Earth,
     tags: [String!],