diff --git a/src/Mollie.Api/Models/Payment/PaymentMethod.cs b/src/Mollie.Api/Models/Payment/PaymentMethod.cs
index c1e1991a..bd7d1ebe 100644
--- a/src/Mollie.Api/Models/Payment/PaymentMethod.cs
+++ b/src/Mollie.Api/Models/Payment/PaymentMethod.cs
@@ -17,6 +17,7 @@ public static class PaymentMethod {
         public const string Refund = "refund";
         public const string KlarnaPayLater = "klarnapaylater";
         public const string KlarnaSliceIt = "klarnasliceit";
+        public const string KlarnaOne = "klarna";
         public const string Przelewy24 = "przelewy24";
         public const string ApplePay = "applepay";
         public const string MealVoucher = "mealvoucher";
diff --git a/tests/Mollie.Tests.Unit/Framework/Factories/PaymentResponseFactoryTests.cs b/tests/Mollie.Tests.Unit/Framework/Factories/PaymentResponseFactoryTests.cs
index 85fdc2ae..1d14141c 100644
--- a/tests/Mollie.Tests.Unit/Framework/Factories/PaymentResponseFactoryTests.cs
+++ b/tests/Mollie.Tests.Unit/Framework/Factories/PaymentResponseFactoryTests.cs
@@ -26,6 +26,7 @@ public class PaymentResponseFactoryTests {
         [InlineData(PaymentMethod.Refund, typeof(PaymentResponse))]
         [InlineData(PaymentMethod.KlarnaPayLater, typeof(PaymentResponse))]
         [InlineData(PaymentMethod.KlarnaSliceIt, typeof(PaymentResponse))]
+        [InlineData(PaymentMethod.KlarnaOne, typeof(PaymentResponse))]
         [InlineData(PaymentMethod.Przelewy24, typeof(PaymentResponse))]
         [InlineData(PaymentMethod.ApplePay, typeof(PaymentResponse))]
         [InlineData(PaymentMethod.MealVoucher, typeof(PaymentResponse))]