diff --git a/Composite/Core/WebClient/Services/WampRouter/AspNetWebsocketTransform.cs b/Composite/Core/WebClient/Services/WampRouter/AspNetWebsocketTransform.cs
index 4b18de463c..ffea9a2c29 100644
--- a/Composite/Core/WebClient/Services/WampRouter/AspNetWebsocketTransform.cs
+++ b/Composite/Core/WebClient/Services/WampRouter/AspNetWebsocketTransform.cs
@@ -78,12 +78,10 @@ public async Task NewConnection(WebSocketData data)
         }
 
         /// <exclude />
-        [RoutePrefix("Composite/api/Router")]
         public class RouterController : ApiController
         {
             /// <exclude />
-            [Route("")]
-            public HttpResponseMessage Get()
+            public virtual HttpResponseMessage Get()
             {
                 if (HttpContext.Current.IsWebSocketRequest)
                 {
diff --git a/Composite/Core/WebClient/Services/WampRouter/IRpcService.cs b/Composite/Core/WebClient/Services/WampRouter/IRpcService.cs
index 9d500462c6..9a3b08fa45 100644
--- a/Composite/Core/WebClient/Services/WampRouter/IRpcService.cs
+++ b/Composite/Core/WebClient/Services/WampRouter/IRpcService.cs
@@ -7,10 +7,5 @@ namespace Composite.Core.WebClient.Services.WampRouter
     /// </summary>
     public interface IRpcService
     {
-        /// <summary>
-        /// Basic ping method
-        /// </summary>
-        [WampProcedure("ping")]
-        void Ping();
     }
 }
\ No newline at end of file
diff --git a/Composite/Core/WebClient/Services/WampRouter/IWampEventHandler.cs b/Composite/Core/WebClient/Services/WampRouter/IWampEventHandler.cs
index 0d570f32f1..b656eae3ef 100644
--- a/Composite/Core/WebClient/Services/WampRouter/IWampEventHandler.cs
+++ b/Composite/Core/WebClient/Services/WampRouter/IWampEventHandler.cs
@@ -5,9 +5,9 @@ namespace Composite.Core.WebClient.Services.WampRouter
     /// <summary>
     /// This class should be implemented when a publisher is going to be registered on Wamp Router
     /// </summary>
-    /// <typeparam name="T1"></typeparam>
-    /// <typeparam name="T2"></typeparam>
-    public interface IWampEventHandler<out T1,out T2>
+    /// <typeparam name="TObservable"></typeparam>
+    /// <typeparam name="TResult"></typeparam>
+    public interface IWampEventHandler<out TObservable,out TResult>
     {
         /// <summary>
         /// Topic uri
@@ -16,12 +16,12 @@ public interface IWampEventHandler<out T1,out T2>
         /// <summary>
         /// Observable event
         /// </summary>
-        IObservable<T1> Event { get; }
+        IObservable<TObservable> Event { get; }
 
         /// <summary>
         /// Data to be published from the observable event
         /// </summary>
         /// <returns></returns>
-        T2 GetNewData();
+        TResult GetNewData();
     }
 }
\ No newline at end of file
diff --git a/Composite/Core/WebClient/Services/WampRouter/WampRouter.cs b/Composite/Core/WebClient/Services/WampRouter/WampRouter.cs
index cdbda7b75a..f779219bb3 100644
--- a/Composite/Core/WebClient/Services/WampRouter/WampRouter.cs
+++ b/Composite/Core/WebClient/Services/WampRouter/WampRouter.cs
@@ -1,5 +1,7 @@
 using System;
+using System.Net.Http;
 using System.Reactive.Subjects;
+using System.Web.Http;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Serialization;
 using WampSharp.Binding;
@@ -9,6 +11,12 @@
 
 namespace Composite.Core.WebClient.Services.WampRouter
 {
+    /// <exclude />
+    [Route("Composite/api/Router")]
+    public class MyRouterController : AspNetWebsocketTransform.RouterController
+    {
+    }
+
     internal class WampRouter
     {
         private const string DefaultRealmName = "realm";
@@ -34,19 +42,21 @@ public void RegisterCallee(string realmName, IRpcService instance)
             registrationTask.Wait();
         }
 
-        public void RegisterPublisher<T1, T2>(IWampEventHandler<T1, T2> eventObservable)
+        public void RegisterPublisher<TObservable, TResult>
+            (IWampEventHandler<TObservable, TResult> eventObservable)
         {
             RegisterPublisher(DefaultRealmName, eventObservable);
         }
 
-        public void RegisterPublisher<T1,T2>(string realmName, IWampEventHandler<T1,T2> eventObservable)
+        public void RegisterPublisher<TObservable, TResult>
+            (string realmName, IWampEventHandler<TObservable,TResult> eventObservable)
         {
             IWampHostedRealm realm = _host.RealmContainer.GetRealmByName(realmName);
 
-            ISubject<T2> subject =
-                realm.Services.GetSubject<T2>(eventObservable.Topic);
+            ISubject<TResult> subject =
+                realm.Services.GetSubject<TResult>(eventObservable.Topic);
 
-            IObservable<T1> observableEvent = eventObservable.Event;
+            IObservable<TObservable> observableEvent = eventObservable.Event;
 
             IDisposable disposable =
                 observableEvent.Subscribe(x =>
diff --git a/Composite/Core/WebClient/Services/WampRouter/WampRouterFacade.cs b/Composite/Core/WebClient/Services/WampRouter/WampRouterFacade.cs
index d5adb542cd..76a90127de 100644
--- a/Composite/Core/WebClient/Services/WampRouter/WampRouterFacade.cs
+++ b/Composite/Core/WebClient/Services/WampRouter/WampRouterFacade.cs
@@ -1,5 +1,3 @@
-using Composite.Core.Application;
-
 namespace Composite.Core.WebClient.Services.WampRouter
 {
     /// <summary>
@@ -25,7 +23,6 @@ public static bool RegisterCallee(string realmName, IRpcService instance)
         /// <summary>
         /// Method for registering callee
         /// </summary>
-        /// <param name="realmName"></param>
         /// <param name="instance"></param>
         /// <returns></returns>
         public static bool RegisterCallee(IRpcService instance)
@@ -42,9 +39,11 @@ public static bool RegisterCallee(IRpcService instance)
         /// </summary>
         /// <param name="realmName"></param>
         /// <param name="eventObservable"></param>
-        /// <typeparam name="T"></typeparam>
+        /// <typeparam name="TObservable"></typeparam>
+        /// <typeparam name="TResult"></typeparam>
         /// <returns></returns>
-        public static bool RegisterPublisher<T1,T2>(string realmName, IWampEventHandler<T1,T2> eventObservable)
+        public static bool RegisterPublisher<TObservable,TResult>
+            (string realmName, IWampEventHandler<TObservable, TResult> eventObservable)
         {
             var wampRouter = ServiceLocator.GetRequiredService<WampRouter>();
             if (wampRouter == null)
@@ -57,9 +56,11 @@ public static bool RegisterPublisher<T1,T2>(string realmName, IWampEventHandler<
         /// Method for registering publisher
         /// </summary>
         /// <param name="eventObservable"></param>
-        /// <typeparam name="T"></typeparam>
+        /// <typeparam name="TObservable"></typeparam>
+        /// <typeparam name="TResult"></typeparam>
         /// <returns></returns>
-        public static bool RegisterPublisher<T1, T2>(IWampEventHandler<T1, T2> eventObservable)
+        public static bool RegisterPublisher<TObservable,TResult>
+            (IWampEventHandler<TObservable, TResult> eventObservable)
         {
             var wampRouter = ServiceLocator.GetRequiredService<WampRouter>();
             if (wampRouter == null)
diff --git a/Website/ReleaseBuild.Web.config b/Website/ReleaseBuild.Web.config
index bd7a751514..74e92a238a 100644
--- a/Website/ReleaseBuild.Web.config
+++ b/Website/ReleaseBuild.Web.config
@@ -92,4 +92,13 @@
 	<system.serviceModel>
 		<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
 	</system.serviceModel>
+	<runtime>
+		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+		  <dependentAssembly>
+			<assemblyIdentity name="System.Collections.Immutable" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" />
+			<codeBase version="1.2.0.0" href="bin\ExtraDllVersion\System.Collections.Immutable.dll" />
+			<bindingRedirect oldVersion="0.0.0.0-1.1.20.0" newVersion="1.1.20.0" />
+		  </dependentAssembly>
+		</assemblyBinding>
+	</runtime>
 </configuration>
diff --git a/Website/WebSite.csproj b/Website/WebSite.csproj
index 5355f8e330..787f739bc9 100644
--- a/Website/WebSite.csproj
+++ b/Website/WebSite.csproj
@@ -2630,8 +2630,7 @@ if not %25rce%25==1 exit %25rce%25 else exit 0</PreBuildEvent>
     </PostBuildEvent>
     <PostBuildEvent>if not exist "$(ProjectDir)\bin\ExtraDllVersion" (
  md "$(ProjectDir)\bin\ExtraDllVersion"
- rem cd "$(SolutionDir)\Packages\System.Collections.Immutable.1.2.0\lib\netstandard1.0" 
- start /MIN copy "$(SolutionDir)\Packages\System.Collections.Immutable.1.2.0\lib\netstandard1.0\*.dll" "$(ProjectDir)\bin\ExtraDllVersion"
+ copy "$(ProjectDir)\..\Packages\System.Collections.Immutable.1.2.0\lib\netstandard1.0\*.dll" "$(ProjectDir)\bin\ExtraDllVersion" /y
   )</PostBuildEvent>
   </PropertyGroup>
 </Project>
\ No newline at end of file