diff --git a/src/Pinch.SDK/Payments/PaymentSaveOptions.cs b/src/Pinch.SDK/Payments/PaymentSaveOptions.cs
index e75b9e0..ad969e3 100644
--- a/src/Pinch.SDK/Payments/PaymentSaveOptions.cs
+++ b/src/Pinch.SDK/Payments/PaymentSaveOptions.cs
@@ -38,6 +38,6 @@ public class PaymentSaveOptions
         /// Optional. Pinch will echo back the nonce value in the response, this is for replay protection.
         /// If the same Nonce is detected the in progress payment object will be returned.
         /// </summary>
-        public string Nonce { get; set; }
+        public List<string> Nonce { get; set; }
     }
 }
diff --git a/src/Pinch.SDK/Pinch.SDK.csproj b/src/Pinch.SDK/Pinch.SDK.csproj
index 961368a..f69ef9b 100644
--- a/src/Pinch.SDK/Pinch.SDK.csproj
+++ b/src/Pinch.SDK/Pinch.SDK.csproj
@@ -13,7 +13,7 @@
     <PackageIconUrl>https://raw.githubusercontent.com/PinchPayments/Pinch.SDK/master/assets/img/circle_logo_64x64.png</PackageIconUrl>
     <PackageProjectUrl>https://github.com/PinchPayments/Pinch.SDK</PackageProjectUrl>
     <RepositoryUrl>https://github.com/PinchPayments/Pinch.SDK</RepositoryUrl>
-    <Version>0.20.1</Version>
+    <Version>0.21.0</Version>
   </PropertyGroup>
 
   <ItemGroup>