diff --git a/Nexmo.Api.Test.Integration/CallTest.cs b/Nexmo.Api.Test.Integration/CallTest.cs
index 5478a21f8..6f80bf795 100644
--- a/Nexmo.Api.Test.Integration/CallTest.cs
+++ b/Nexmo.Api.Test.Integration/CallTest.cs
@@ -53,7 +53,7 @@ public void should_edit_specified_call()
             var id = "ffffffff-ffff-ffff-ffff-ffffffffffff";
             var results = Call.Edit(id, new Call.CallEditCommand
             {
-                action = "hangup"
+                Action = "hangup"
             });
             Assert.AreEqual(id, results.uuid);
         }
diff --git a/Nexmo.Api/Nexmo.Api.csproj b/Nexmo.Api/Nexmo.Api.csproj
index 2e2afd960..4dfa262f7 100644
--- a/Nexmo.Api/Nexmo.Api.csproj
+++ b/Nexmo.Api/Nexmo.Api.csproj
@@ -42,6 +42,7 @@
   </PropertyGroup>
   
   <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.8" />
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="1.0.2" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="1.0.2" />
     <PackageReference Include="System.Collections.Immutable" Version="1.2.*" />
diff --git a/Nexmo.Api/Voice/Call.cs b/Nexmo.Api/Voice/Call.cs
index fc663c418..ccd43f4e6 100644
--- a/Nexmo.Api/Voice/Call.cs
+++ b/Nexmo.Api/Voice/Call.cs
@@ -111,11 +111,21 @@ public class CallEditCommand
             /// unearmuff Removes the earmuff effect from this call leg.
             /// transfer  Transfers this call leg to another NCCO, as specified by the destination parameter.
             /// </summary>
-            public string action { get; set; }
+            [JsonProperty("action")]
+            public string Action { get; set; }
             /// <summary>
             /// Optional. A JSON object pointing to a replacement NCCO, when action is transfer.
             /// </summary>
-            public string destination { get; set; }
+            [JsonProperty("destination")]
+            public Destination Destination { get; set; }
+        }
+
+        public class Destination
+        {
+            [JsonProperty("type")]
+            public string Type { get; set; }
+            [JsonProperty("url")]
+            public string[] Url { get; set; }
         }
 
         public class SearchFilter