diff --git a/src/core/Elsa/Elsa.csproj b/src/core/Elsa/Elsa.csproj
index 17804a4c6..7755bc9a2 100644
--- a/src/core/Elsa/Elsa.csproj
+++ b/src/core/Elsa/Elsa.csproj
@@ -14,8 +14,6 @@
 
     <ItemGroup>
         <ProjectReference Include="..\..\activities\Elsa.Activities.Console\Elsa.Activities.Console.csproj" />
-        <ProjectReference Include="..\..\activities\Elsa.Activities.Email\Elsa.Activities.Email.csproj" />
-        <ProjectReference Include="..\..\activities\Elsa.Activities.UserTask\Elsa.Activities.UserTask.csproj" />
         <ProjectReference Include="..\..\scripting\Elsa.Scripting.Liquid\Elsa.Scripting.Liquid.csproj" />
         <ProjectReference Include="..\..\scripting\Elsa.Scripting.JavaScript\Elsa.Scripting.JavaScript.csproj" />
         <ProjectReference Include="..\Elsa.Core\Elsa.Core.csproj" />
diff --git a/src/samples/console/Elsa.Samples.UserTaskConsole/Elsa.Samples.UserTaskConsole.csproj b/src/samples/console/Elsa.Samples.UserTaskConsole/Elsa.Samples.UserTaskConsole.csproj
index 755d13e62..1f16298e6 100644
--- a/src/samples/console/Elsa.Samples.UserTaskConsole/Elsa.Samples.UserTaskConsole.csproj
+++ b/src/samples/console/Elsa.Samples.UserTaskConsole/Elsa.Samples.UserTaskConsole.csproj
@@ -12,6 +12,7 @@
     </ItemGroup>
 
     <ItemGroup>
+        <ProjectReference Include="..\..\..\activities\Elsa.Activities.UserTask\Elsa.Activities.UserTask.csproj" />
         <ProjectReference Include="..\..\..\core\Elsa\Elsa.csproj" />
     </ItemGroup>
 
diff --git a/src/samples/dashboard/aspnetcore/ElsaDashboard.Samples.AspNetCore.Monolith/ElsaDashboard.Samples.AspNetCore.Monolith.csproj b/src/samples/dashboard/aspnetcore/ElsaDashboard.Samples.AspNetCore.Monolith/ElsaDashboard.Samples.AspNetCore.Monolith.csproj
index a1d405f38..f9fbd0a71 100644
--- a/src/samples/dashboard/aspnetcore/ElsaDashboard.Samples.AspNetCore.Monolith/ElsaDashboard.Samples.AspNetCore.Monolith.csproj
+++ b/src/samples/dashboard/aspnetcore/ElsaDashboard.Samples.AspNetCore.Monolith/ElsaDashboard.Samples.AspNetCore.Monolith.csproj
@@ -17,6 +17,7 @@
     </ItemGroup>
 
     <ItemGroup>
+      <ProjectReference Include="..\..\..\..\activities\Elsa.Activities.Email\Elsa.Activities.Email.csproj" />
       <ProjectReference Include="..\..\..\..\activities\Elsa.Activities.Temporal.Quartz\Elsa.Activities.Temporal.Quartz.csproj" />
       <ProjectReference Include="..\..\..\..\core\Elsa\Elsa.csproj" />
       <ProjectReference Include="..\..\..\..\designer\bindings\blazor\Elsa.Designer.Bindings.Blazor\Elsa.Designer.Bindings.Blazor.csproj" />
diff --git a/src/samples/dashboard/blazor/ElsaDashboard.Samples.Monolith/ElsaDashboard.Samples.Monolith.csproj b/src/samples/dashboard/blazor/ElsaDashboard.Samples.Monolith/ElsaDashboard.Samples.Monolith.csproj
index cbff8d342..0b6343219 100644
--- a/src/samples/dashboard/blazor/ElsaDashboard.Samples.Monolith/ElsaDashboard.Samples.Monolith.csproj
+++ b/src/samples/dashboard/blazor/ElsaDashboard.Samples.Monolith/ElsaDashboard.Samples.Monolith.csproj
@@ -14,6 +14,7 @@
     </ItemGroup>
 
     <ItemGroup>
+        <ProjectReference Include="..\..\..\..\activities\Elsa.Activities.Email\Elsa.Activities.Email.csproj" />
         <ProjectReference Include="..\..\..\..\activities\Elsa.Activities.Telnyx\Elsa.Activities.Telnyx.csproj" />
         <ProjectReference Include="..\..\..\..\activities\Elsa.Activities.Temporal.Quartz\Elsa.Activities.Temporal.Quartz.csproj" />
         <ProjectReference Include="..\..\..\..\core\Elsa\Elsa.csproj" />
diff --git a/src/samples/server/Elsa.Samples.Server.Host/Elsa.Samples.Server.Host.csproj b/src/samples/server/Elsa.Samples.Server.Host/Elsa.Samples.Server.Host.csproj
index 3d2d28fd7..ce1af2a9d 100644
--- a/src/samples/server/Elsa.Samples.Server.Host/Elsa.Samples.Server.Host.csproj
+++ b/src/samples/server/Elsa.Samples.Server.Host/Elsa.Samples.Server.Host.csproj
@@ -9,8 +9,10 @@
     </PropertyGroup>
 
     <ItemGroup>
+        <ProjectReference Include="..\..\..\activities\Elsa.Activities.Email\Elsa.Activities.Email.csproj" />
         <ProjectReference Include="..\..\..\activities\Elsa.Activities.Telnyx\Elsa.Activities.Telnyx.csproj" />
         <ProjectReference Include="..\..\..\activities\Elsa.Activities.Temporal.Quartz\Elsa.Activities.Temporal.Quartz.csproj" />
+        <ProjectReference Include="..\..\..\activities\Elsa.Activities.UserTask\Elsa.Activities.UserTask.csproj" />
         <ProjectReference Include="..\..\..\persistence\Elsa.Persistence.EntityFramework\Elsa.Persistence.EntityFramework.Sqlite\Elsa.Persistence.EntityFramework.Sqlite.csproj" />
         <ProjectReference Include="..\..\..\persistence\Elsa.Persistence.YesSql\Elsa.Persistence.YesSql.csproj" />
         <ProjectReference Include="..\..\..\server\Elsa.Server.Api\Elsa.Server.Api.csproj" />
diff --git a/src/samples/server/Elsa.Samples.Server.Host/Startup.cs b/src/samples/server/Elsa.Samples.Server.Host/Startup.cs
index 29d62e081..c6e3acba4 100644
--- a/src/samples/server/Elsa.Samples.Server.Host/Startup.cs
+++ b/src/samples/server/Elsa.Samples.Server.Host/Startup.cs
@@ -2,7 +2,6 @@ using Elsa.Activities.Telnyx.Extensions;
 using Elsa.Activities.UserTask.Extensions;
 using Elsa.Persistence.EntityFramework.Core.Extensions;
 using Elsa.Persistence.EntityFramework.Sqlite;
-using Elsa.Persistence.YesSql;
 using Elsa.Server.Hangfire.Extensions;
 using Hangfire;
 using Microsoft.AspNetCore.Builder;
@@ -12,7 +11,6 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using NodaTime;
 using NodaTime.Serialization.JsonNet;
-using YesSql.Provider.Sqlite;
 
 namespace Elsa.Samples.Server.Host
 {
diff --git a/test/integration/Elsa.Core.IntegrationTests/Elsa.Core.IntegrationTests.csproj b/test/integration/Elsa.Core.IntegrationTests/Elsa.Core.IntegrationTests.csproj
index 35090820c..0847218dd 100644
--- a/test/integration/Elsa.Core.IntegrationTests/Elsa.Core.IntegrationTests.csproj
+++ b/test/integration/Elsa.Core.IntegrationTests/Elsa.Core.IntegrationTests.csproj
@@ -42,6 +42,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\..\..\src\activities\Elsa.Activities.UserTask\Elsa.Activities.UserTask.csproj" />
     <ProjectReference Include="..\..\..\src\core\Elsa\Elsa.csproj" />
     <ProjectReference Include="..\..\shared\Elsa.Testing.Shared\Elsa.Testing.Shared.csproj" />
     <ProjectReference Include="..\..\..\src\activities\Elsa.Activities.Temporal.Common\Elsa.Activities.Temporal.Common.csproj" />