diff --git a/GreenArrow.Engine.Test/DKIMKeysApi/DKIMKeysApiTest.cs b/GreenArrow.Engine.Test/DKIMKeysApi/DKIMKeysApiTest.cs
index a2efff8..06c84eb 100644
--- a/GreenArrow.Engine.Test/DKIMKeysApi/DKIMKeysApiTest.cs
+++ b/GreenArrow.Engine.Test/DKIMKeysApi/DKIMKeysApiTest.cs
@@ -6,7 +6,7 @@
 using Moq.Protected;
 using System.Net;
 
-namespace GreenArrow.Engine.Test.HttpSubmissionApi
+namespace GreenArrow.Engine.Test.DKIMKeysApi
 {
     public class DKIMKeysApiTest
     {
diff --git a/GreenArrow.Engine/DKIMKeysApi/DKIMKeysResponse.cs b/GreenArrow.Engine/DKIMKeysApi/DKIMKeysResponse.cs
index b3ba93f..a6210d2 100644
--- a/GreenArrow.Engine/DKIMKeysApi/DKIMKeysResponse.cs
+++ b/GreenArrow.Engine/DKIMKeysApi/DKIMKeysResponse.cs
@@ -26,7 +26,7 @@ public class DKIMKeysResponse : IRestApiModel
         /// <summary>
         /// Error message when request was not accepted
         /// </summary>
-        public string ErrorMessages { get; init; }
+        public string[] ErrorMessages { get; init; }
     }
 
     /// <summary>
diff --git a/GreenArrow.Engine/Model/DkimKey.cs b/GreenArrow.Engine/Model/DkimKey.cs
index 1d71073..9474ddc 100644
--- a/GreenArrow.Engine/Model/DkimKey.cs
+++ b/GreenArrow.Engine/Model/DkimKey.cs
@@ -38,7 +38,7 @@ public class Key
         /// <summary>
         /// The number of bits used to generate this key.
         /// </summary>
-        public int Bits { get; init; }
+        public int? Bits { get; init; }
 
         /// <summary>
         /// The PEM-encoded private key.