diff --git a/appveyor.yml b/appveyor.yml
index 37cf2bd6..395e457f 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 4.0.{build}
+version: 4.1.{build}
 branches:
   only:
   - master
diff --git a/src/EcsRx.Examples/ExampleApps/Performance/Modules/CustomFrameworkModule.cs b/src/EcsRx.Examples/ExampleApps/Performance/Modules/CustomFrameworkModule.cs
index 08cc8b43..283a90a2 100644
--- a/src/EcsRx.Examples/ExampleApps/Performance/Modules/CustomFrameworkModule.cs
+++ b/src/EcsRx.Examples/ExampleApps/Performance/Modules/CustomFrameworkModule.cs
@@ -5,6 +5,7 @@
 using SystemsRx.Executor.Handlers.Conventional;
 using SystemsRx.Infrastructure.Dependencies;
 using SystemsRx.Infrastructure.Extensions;
+using SystemsRx.Pools;
 using EcsRx.Collections;
 using EcsRx.Collections.Database;
 using EcsRx.Collections.Entity;
@@ -14,7 +15,6 @@
 using EcsRx.Examples.ExampleApps.Performance.Components.Specific;
 using EcsRx.Groups.Observable;
 using EcsRx.MicroRx.Events;
-using EcsRx.Pools;
 
 namespace EcsRx.Examples.ExampleApps.Performance.Modules
 {
diff --git a/src/EcsRx.Infrastructure/Modules/EcsRxInfrastructureModule.cs b/src/EcsRx.Infrastructure/Modules/EcsRxInfrastructureModule.cs
index a05b4036..03ba6c28 100644
--- a/src/EcsRx.Infrastructure/Modules/EcsRxInfrastructureModule.cs
+++ b/src/EcsRx.Infrastructure/Modules/EcsRxInfrastructureModule.cs
@@ -1,6 +1,7 @@
 using SystemsRx.Executor.Handlers;
 using SystemsRx.Infrastructure.Dependencies;
 using SystemsRx.Infrastructure.Extensions;
+using SystemsRx.Pools;
 using EcsRx.Collections;
 using EcsRx.Collections.Database;
 using EcsRx.Collections.Entity;
@@ -8,7 +9,6 @@
 using EcsRx.Components.Lookups;
 using EcsRx.Entities;
 using EcsRx.Groups.Observable;
-using EcsRx.Pools;
 using EcsRx.Systems.Handlers;
 
 namespace EcsRx.Infrastructure.Modules
diff --git a/src/EcsRx.Plugins.Computeds/ComputedFromData.cs b/src/EcsRx.Plugins.Computeds/ComputedFromData.cs
index 26bb846e..0cedc358 100644
--- a/src/EcsRx.Plugins.Computeds/ComputedFromData.cs
+++ b/src/EcsRx.Plugins.Computeds/ComputedFromData.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using SystemsRx.Extensions;
-using EcsRx.Extensions;
 using EcsRx.MicroRx.Extensions;
 using EcsRx.MicroRx.Subjects;
 
diff --git a/src/EcsRx.Plugins.Views/Pooling/IViewPool.cs b/src/EcsRx.Plugins.Views/Pooling/IViewPool.cs
index 80e13e96..fa9b9d9c 100644
--- a/src/EcsRx.Plugins.Views/Pooling/IViewPool.cs
+++ b/src/EcsRx.Plugins.Views/Pooling/IViewPool.cs
@@ -1,4 +1,4 @@
-using EcsRx.Pools;
+using SystemsRx.Pools;
 
 namespace EcsRx.Plugins.Views.Pooling
 {
diff --git a/src/EcsRx.Tests/EcsRx/Pools/IdPoolTests.cs b/src/EcsRx.Tests/EcsRx/Pools/IdPoolTests.cs
index 35379922..a54cbb2e 100644
--- a/src/EcsRx.Tests/EcsRx/Pools/IdPoolTests.cs
+++ b/src/EcsRx.Tests/EcsRx/Pools/IdPoolTests.cs
@@ -1,6 +1,6 @@
 using System.Collections.Generic;
 using System.Linq;
-using EcsRx.Pools;
+using SystemsRx.Pools;
 using Xunit;
 
 namespace EcsRx.Tests.EcsRx.Pools
diff --git a/src/EcsRx.Tests/EcsRx/Pools/IndexPoolTests.cs b/src/EcsRx.Tests/EcsRx/Pools/IndexPoolTests.cs
index 8b7a923a..2df88a7a 100644
--- a/src/EcsRx.Tests/EcsRx/Pools/IndexPoolTests.cs
+++ b/src/EcsRx.Tests/EcsRx/Pools/IndexPoolTests.cs
@@ -1,6 +1,6 @@
 using System.Collections.Generic;
 using System.Linq;
-using EcsRx.Pools;
+using SystemsRx.Pools;
 using Xunit;
 
 namespace EcsRx.Tests.EcsRx.Pools
diff --git a/src/EcsRx.Tests/Sanity/SanityTests.cs b/src/EcsRx.Tests/Sanity/SanityTests.cs
index 42abd261..437264e2 100644
--- a/src/EcsRx.Tests/Sanity/SanityTests.cs
+++ b/src/EcsRx.Tests/Sanity/SanityTests.cs
@@ -5,6 +5,7 @@
 using SystemsRx.Executor;
 using SystemsRx.Executor.Handlers;
 using SystemsRx.Executor.Handlers.Conventional;
+using SystemsRx.Pools;
 using SystemsRx.Threading;
 using EcsRx.Collections;
 using EcsRx.Collections.Database;
@@ -20,7 +21,6 @@
 using EcsRx.Plugins.ReactiveSystems.Handlers;
 using EcsRx.Plugins.Views.Components;
 using EcsRx.Plugins.Views.Systems;
-using EcsRx.Pools;
 using EcsRx.ReactiveData;
 using EcsRx.ReactiveData.Collections;
 using EcsRx.ReactiveData.Extensions;
diff --git a/src/EcsRx/Components/ComponentPool.cs b/src/EcsRx/Components/ComponentPool.cs
index b8279a38..e695690f 100644
--- a/src/EcsRx/Components/ComponentPool.cs
+++ b/src/EcsRx/Components/ComponentPool.cs
@@ -1,7 +1,7 @@
 using System;
 using System.Collections;
+using SystemsRx.Pools;
 using EcsRx.MicroRx.Subjects;
-using EcsRx.Pools;
 
 namespace EcsRx.Components
 {
diff --git a/src/EcsRx/Entities/DefaultEntityFactory.cs b/src/EcsRx/Entities/DefaultEntityFactory.cs
index 8c5d985e..5f79ac61 100644
--- a/src/EcsRx/Entities/DefaultEntityFactory.cs
+++ b/src/EcsRx/Entities/DefaultEntityFactory.cs
@@ -1,7 +1,7 @@
 using System;
+using SystemsRx.Pools;
 using EcsRx.Components.Database;
 using EcsRx.Components.Lookups;
-using EcsRx.Pools;
 
 namespace EcsRx.Entities
 {
diff --git a/src/EcsRx/Pools/IIdPool.cs b/src/SystemsRx/Pools/IIdPool.cs
similarity index 81%
rename from src/EcsRx/Pools/IIdPool.cs
rename to src/SystemsRx/Pools/IIdPool.cs
index 22c6ed72..d08eae44 100644
--- a/src/EcsRx/Pools/IIdPool.cs
+++ b/src/SystemsRx/Pools/IIdPool.cs
@@ -1,4 +1,4 @@
-namespace EcsRx.Pools
+namespace SystemsRx.Pools
 {
     public interface IIdPool : IPool<int>
     {
diff --git a/src/EcsRx/Pools/IPool.cs b/src/SystemsRx/Pools/IPool.cs
similarity index 95%
rename from src/EcsRx/Pools/IPool.cs
rename to src/SystemsRx/Pools/IPool.cs
index a40ab711..b20a5369 100644
--- a/src/EcsRx/Pools/IPool.cs
+++ b/src/SystemsRx/Pools/IPool.cs
@@ -1,4 +1,4 @@
-namespace EcsRx.Pools
+namespace SystemsRx.Pools
 {
     public interface IPool<T>
     {
diff --git a/src/EcsRx/Pools/IdPool.cs b/src/SystemsRx/Pools/IdPool.cs
similarity index 98%
rename from src/EcsRx/Pools/IdPool.cs
rename to src/SystemsRx/Pools/IdPool.cs
index 9776500c..86222012 100644
--- a/src/EcsRx/Pools/IdPool.cs
+++ b/src/SystemsRx/Pools/IdPool.cs
@@ -2,7 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 
-namespace EcsRx.Pools
+namespace SystemsRx.Pools
 {
     public class IdPool : IIdPool
     {
diff --git a/src/EcsRx/Pools/IndexPool.cs b/src/SystemsRx/Pools/IndexPool.cs
similarity index 98%
rename from src/EcsRx/Pools/IndexPool.cs
rename to src/SystemsRx/Pools/IndexPool.cs
index 37107658..23cd3bd6 100644
--- a/src/EcsRx/Pools/IndexPool.cs
+++ b/src/SystemsRx/Pools/IndexPool.cs
@@ -2,7 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 
-namespace EcsRx.Pools
+namespace SystemsRx.Pools
 {   
     public class IndexPool : IPool<int>
     {