diff --git a/Deploy/Nuget/Build.cmd b/Deploy/Nuget/Build.cmd
index 23e9851..e8ae4d1 100644
--- a/Deploy/Nuget/Build.cmd
+++ b/Deploy/Nuget/Build.cmd
@@ -4,7 +4,7 @@
 
 :: settings
 set nugetPath=%cd%\..\..\.nuget
-set version=0.5.1
+set version=0.8.1
 set output=%cd%\bin
 
 :: Create output directory
diff --git a/Samples/ServerClientSample/Client/Program.cs b/Samples/ServerClientSample/Client/Program.cs
index 9fcf1ec..26a524b 100644
--- a/Samples/ServerClientSample/Client/Program.cs
+++ b/Samples/ServerClientSample/Client/Program.cs
@@ -37,7 +37,7 @@ static void Main(string[] args)
                 c.OnOpen += async () =>
                 {
                     var r = await RPC.For<ILocalAPI>().CallAsync(x => x.LongRunningTask(5, 3));
-                    Console.WriteLine("Result: " + r.First().Result);
+                    Console.WriteLine("Result: " + r.First());
                 };
             })
             .Wait(0);
diff --git a/Source/WebsocketRPC/ConnectionBinders/Binder.cs b/Source/WebsocketRPC/ConnectionBinders/Binder.cs
index 28766fc..4c77818 100644
--- a/Source/WebsocketRPC/ConnectionBinders/Binder.cs
+++ b/Source/WebsocketRPC/ConnectionBinders/Binder.cs
@@ -84,12 +84,12 @@ public async Task<TResult> CallAsync<TResult>(Expression<Func<TInterface, TResul
             return await rInvoker.InvokeAsync(functionExpression);
         }
 
-        public async Task<Task> CallAsync(Expression<Func<TInterface, Task>> functionExpression)
+        public async Task CallAsync(Expression<Func<TInterface, Task>> functionExpression)
         {
-            return await rInvoker.InvokeAsync(functionExpression);
+            await rInvoker.InvokeAsync(functionExpression);
         }
 
-        public async Task<Task<TResult>> CallAsync<TResult>(Expression<Func<TInterface, Task<TResult>>> functionExpression)
+        public async Task<TResult> CallAsync<TResult>(Expression<Func<TInterface, Task<TResult>>> functionExpression)
         {
             return await rInvoker.InvokeAsync(functionExpression);
         }
diff --git a/Source/WebsocketRPC/ConnectionBinders/BinderBase.cs b/Source/WebsocketRPC/ConnectionBinders/BinderBase.cs
index f6698ba..d330018 100644
--- a/Source/WebsocketRPC/ConnectionBinders/BinderBase.cs
+++ b/Source/WebsocketRPC/ConnectionBinders/BinderBase.cs
@@ -80,7 +80,7 @@ public interface IRemoteBinder<T> : IBinder
         /// </summary>
         /// <param name="functionExpression">Method getter.</param>
         /// <returns>RPC task result.</returns>
-        Task<Task> CallAsync(Expression<Func<T, Task>> functionExpression);
+        Task CallAsync(Expression<Func<T, Task>> functionExpression);
 
         /// <summary>
         /// Calls the RPC method.
@@ -88,7 +88,7 @@ public interface IRemoteBinder<T> : IBinder
         /// <typeparam name="TResult">Result.</typeparam>
         /// <param name="functionExpression">Method getter.</param>
         /// <returns>RPC result.</returns>
-        Task<Task<TResult>> CallAsync<TResult>(Expression<Func<T, Task<TResult>>> functionExpression);
+        Task<TResult> CallAsync<TResult>(Expression<Func<T, Task<TResult>>> functionExpression);
     }
 
     /// <summary>
diff --git a/Source/WebsocketRPC/ConnectionBinders/RemoteBinder.cs b/Source/WebsocketRPC/ConnectionBinders/RemoteBinder.cs
index e298c00..768957d 100644
--- a/Source/WebsocketRPC/ConnectionBinders/RemoteBinder.cs
+++ b/Source/WebsocketRPC/ConnectionBinders/RemoteBinder.cs
@@ -68,12 +68,12 @@ public async Task<TResult> CallAsync<TResult>(Expression<Func<TInterface, TResul
             return await rInvoker.InvokeAsync(functionExpression);
         }
 
-        public async Task<Task> CallAsync(Expression<Func<TInterface, Task>> functionExpression)
+        public async Task CallAsync(Expression<Func<TInterface, Task>> functionExpression)
         {
-            return await rInvoker.InvokeAsync(functionExpression);
+            await rInvoker.InvokeAsync(functionExpression);
         }
 
-        public async Task<Task<TResult>> CallAsync<TResult>(Expression<Func<TInterface, Task<TResult>>> functionExpression)
+        public async Task<TResult> CallAsync<TResult>(Expression<Func<TInterface, Task<TResult>>> functionExpression)
         {
             return await rInvoker.InvokeAsync(functionExpression);
         }
diff --git a/Source/WebsocketRPC/Invokers/RemoteInvoker.cs b/Source/WebsocketRPC/Invokers/RemoteInvoker.cs
index eb0adde..d4f4236 100644
--- a/Source/WebsocketRPC/Invokers/RemoteInvoker.cs
+++ b/Source/WebsocketRPC/Invokers/RemoteInvoker.cs
@@ -105,18 +105,16 @@ public async Task<TResult> InvokeAsync<TResult>(Expression<Func<TInterface, TRes
             return result;
         }
 
-        public async Task<Task> InvokeAsync(Expression<Func<TInterface, Task>> functionExpression)
+        public async Task InvokeAsync(Expression<Func<TInterface, Task>> functionExpression)
         {
             var (funcName, argVals) = getFunctionInfo(functionExpression);
             var response = await invokeAsync(funcName, argVals);
 
             if (response.Error != null)
                 throw new Exception(response.Error);
-
-            return Task.FromResult(true);
         }
 
-        public async Task<Task<TResult>> InvokeAsync<TResult>(Expression<Func<TInterface, Task<TResult>>> functionExpression)
+        public async Task<TResult> InvokeAsync<TResult>(Expression<Func<TInterface, Task<TResult>>> functionExpression)
         {
             var (funcName, argVals) = getFunctionInfo(functionExpression);
             var response = await invokeAsync(funcName, argVals);
@@ -125,7 +123,7 @@ public async Task<Task<TResult>> InvokeAsync<TResult>(Expression<Func<TInterface
             if (response.Error != null)
                 throw new Exception(response.Error);
 
-            return Task.FromResult(result);
+            return result;
         }
 
         async Task<Response> invokeAsync(string name, params object[] args)
diff --git a/Source/WebsocketRPC/RPC.cs b/Source/WebsocketRPC/RPC.cs
index 0bb42fe..c691ea5 100644
--- a/Source/WebsocketRPC/RPC.cs
+++ b/Source/WebsocketRPC/RPC.cs
@@ -196,9 +196,9 @@ public static async Task CallAsync<TInterface>(this IEnumerable<IRemoteBinder<TI
         /// <param name="binders">Remote binder collection.</param>
         /// <param name="functionExpression">Method getter.</param>
         /// <returns>The collection of results.</returns>
-        public static async Task<Task<TResult>[]> CallAsync<TInterface, TResult>(this IEnumerable<IRemoteBinder<TInterface>> binders, Expression<Func<TInterface, Task<TResult>>> functionExpression)
+        public static async Task<TResult[]> CallAsync<TInterface, TResult>(this IEnumerable<IRemoteBinder<TInterface>> binders, Expression<Func<TInterface, Task<TResult>>> functionExpression)
         {
-            var tasks = new List<Task<Task<TResult>>>();
+            var tasks = new List<Task<TResult>>();
             foreach (var b in binders)
             {
                 var t = b.CallAsync(functionExpression);