diff --git a/src/Microsoft.AspNetCore.SignalR.Core/DynamicHub.cs b/src/Microsoft.AspNetCore.SignalR.Core/DynamicHub.cs
index 8571b1f3ad..f37460cacd 100644
--- a/src/Microsoft.AspNetCore.SignalR.Core/DynamicHub.cs
+++ b/src/Microsoft.AspNetCore.SignalR.Core/DynamicHub.cs
@@ -3,7 +3,7 @@
 
 namespace Microsoft.AspNetCore.SignalR
 {
-    public class DynamicHub : Hub
+    public abstract class DynamicHub : Hub
     {
         private DynamicHubClients _clients;
 
diff --git a/src/Microsoft.AspNetCore.SignalR.Core/Hub.cs b/src/Microsoft.AspNetCore.SignalR.Core/Hub.cs
index 7075660886..63a36fe92a 100644
--- a/src/Microsoft.AspNetCore.SignalR.Core/Hub.cs
+++ b/src/Microsoft.AspNetCore.SignalR.Core/Hub.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Microsoft.AspNetCore.SignalR
 {
-    public class Hub : IDisposable
+    public abstract class Hub : IDisposable
     {
         private bool _disposed;
         private IHubCallerClients _clients;
diff --git a/src/Microsoft.AspNetCore.SignalR.Core/Hub`T.cs b/src/Microsoft.AspNetCore.SignalR.Core/Hub`T.cs
index 8bce9b3507..5463b7c35e 100644
--- a/src/Microsoft.AspNetCore.SignalR.Core/Hub`T.cs
+++ b/src/Microsoft.AspNetCore.SignalR.Core/Hub`T.cs
@@ -5,7 +5,7 @@ using Microsoft.AspNetCore.SignalR.Internal;
 
 namespace Microsoft.AspNetCore.SignalR
 {
-    public class Hub<T> : Hub where T : class
+    public abstract class Hub<T> : Hub where T : class
     {
         private IHubCallerClients<T> _clients;
 
diff --git a/test/Microsoft.AspNetCore.SignalR.Tests/DefaultHubActivatorTests.cs b/test/Microsoft.AspNetCore.SignalR.Tests/DefaultHubActivatorTests.cs
index dd75dd3d51..5584031e35 100644
--- a/test/Microsoft.AspNetCore.SignalR.Tests/DefaultHubActivatorTests.cs
+++ b/test/Microsoft.AspNetCore.SignalR.Tests/DefaultHubActivatorTests.cs
@@ -11,11 +11,15 @@ namespace Microsoft.AspNetCore.SignalR.Tests
 {
     public class DefaultHubActivatorTests
     {
+        public class CreatableHub : Hub
+        {
+        }
+
         [Fact]
         public void HubCreatedIfNotResolvedFromServiceProvider()
         {
             Assert.NotNull(
-                new DefaultHubActivator<Hub>(Mock.Of<IServiceProvider>()).Create());
+                new DefaultHubActivator<CreatableHub>(Mock.Of<IServiceProvider>()).Create());
         }
 
         [Fact]