diff --git a/src/activities/webhooks/Elsa.Activities.Webhooks/Elsa.Activities.Webhooks.csproj b/src/activities/webhooks/Elsa.Activities.Webhooks/Elsa.Activities.Webhooks.csproj
index 17f6b2faf..db4b394be 100644
--- a/src/activities/webhooks/Elsa.Activities.Webhooks/Elsa.Activities.Webhooks.csproj
+++ b/src/activities/webhooks/Elsa.Activities.Webhooks/Elsa.Activities.Webhooks.csproj
@@ -4,7 +4,7 @@
     <Import Project="..\..\..\..\configureawait.props" />
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
         <Description>
             Elsa is a set of workflow libraries and tools that enable lean and mean workflowing capabilities in any .NET Core application.
             This package provides Webhook activities.
diff --git a/src/activities/webhooks/Elsa.Webhooks.Api/Elsa.Webhooks.Api.csproj b/src/activities/webhooks/Elsa.Webhooks.Api/Elsa.Webhooks.Api.csproj
index 527277037..8eedc40d3 100644
--- a/src/activities/webhooks/Elsa.Webhooks.Api/Elsa.Webhooks.Api.csproj
+++ b/src/activities/webhooks/Elsa.Webhooks.Api/Elsa.Webhooks.Api.csproj
@@ -4,7 +4,7 @@
     <Import Project="..\..\..\..\configureawait.props"/>
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
         <Description>
             Elsa is a set of workflow libraries and tools that enable lean and mean workflowing capabilities in any .NET Core application.
             This package provides Webhook API endpoints for managing webhook definitions.
diff --git a/src/activities/webhooks/Elsa.Webhooks.Api/IsExternalInit.cs b/src/activities/webhooks/Elsa.Webhooks.Api/IsExternalInit.cs
new file mode 100644
index 000000000..8ce226317
--- /dev/null
+++ b/src/activities/webhooks/Elsa.Webhooks.Api/IsExternalInit.cs
@@ -0,0 +1,17 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.ComponentModel;
+
+// ReSharper disable once CheckNamespace
+namespace System.Runtime.CompilerServices
+{
+    /// <summary>
+    /// Reserved to be used by the compiler for tracking metadata.
+    /// This class should not be used by developers in source code.
+    /// </summary>
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    internal static class IsExternalInit
+    {
+    }
+}
\ No newline at end of file
diff --git a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.Core/Elsa.Webhooks.Persistence.EntityFramework.Core.csproj b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.Core/Elsa.Webhooks.Persistence.EntityFramework.Core.csproj
index 551a94d42..f6473e848 100644
--- a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.Core/Elsa.Webhooks.Persistence.EntityFramework.Core.csproj
+++ b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.Core/Elsa.Webhooks.Persistence.EntityFramework.Core.csproj
@@ -4,7 +4,7 @@
     <Import Project="..\..\..\..\configureawait.props" />
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
         <Description>
             Elsa is a set of workflow libraries and tools that enable lean and mean workflowing capabilities in any .NET Core application.
             This package provides Webhook EF Core persistence.
diff --git a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.MySql/Elsa.Webhooks.Persistence.EntityFramework.MySql.csproj b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.MySql/Elsa.Webhooks.Persistence.EntityFramework.MySql.csproj
index df71dd77e..be8b31dce 100644
--- a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.MySql/Elsa.Webhooks.Persistence.EntityFramework.MySql.csproj
+++ b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.MySql/Elsa.Webhooks.Persistence.EntityFramework.MySql.csproj
@@ -4,7 +4,7 @@
     <Import Project="..\..\..\..\configureawait.props" />
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
         <Description>
             Elsa is a set of workflow libraries and tools that enable lean and mean workflowing capabilities in any .NET Core application.
             This package provides the MySql EF Core provider for Webhook persistence.
diff --git a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.PostgreSql/Elsa.Webhooks.Persistence.EntityFramework.PostgreSql.csproj b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.PostgreSql/Elsa.Webhooks.Persistence.EntityFramework.PostgreSql.csproj
index f4d51d0ee..77b443fa1 100644
--- a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.PostgreSql/Elsa.Webhooks.Persistence.EntityFramework.PostgreSql.csproj
+++ b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.PostgreSql/Elsa.Webhooks.Persistence.EntityFramework.PostgreSql.csproj
@@ -4,7 +4,7 @@
     <Import Project="..\..\..\..\configureawait.props"/>
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
         <Description>
             Elsa is a set of workflow libraries and tools that enable lean and mean workflowing capabilities in any .NET Core application.
             This package provides the PostgreSQL EF Core provider for Webhook persistence.
diff --git a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.SqlServer/Elsa.Webhooks.Persistence.EntityFramework.SqlServer.csproj b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.SqlServer/Elsa.Webhooks.Persistence.EntityFramework.SqlServer.csproj
index 5d6ee5245..d33598e19 100644
--- a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.SqlServer/Elsa.Webhooks.Persistence.EntityFramework.SqlServer.csproj
+++ b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.SqlServer/Elsa.Webhooks.Persistence.EntityFramework.SqlServer.csproj
@@ -4,7 +4,7 @@
     <Import Project="..\..\..\..\configureawait.props"/>
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
         <Description>
             Elsa is a set of workflow libraries and tools that enable lean and mean workflowing capabilities in any .NET Core application.
             This package provides the SqlServer EF Core provider for Webhook persistence.
diff --git a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.Sqlite/Elsa.Webhooks.Persistence.EntityFramework.Sqlite.csproj b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.Sqlite/Elsa.Webhooks.Persistence.EntityFramework.Sqlite.csproj
index adb34eac5..2b8d0e60f 100644
--- a/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.Sqlite/Elsa.Webhooks.Persistence.EntityFramework.Sqlite.csproj
+++ b/src/activities/webhooks/Elsa.Webhooks.Persistence.EntityFramework.Sqlite/Elsa.Webhooks.Persistence.EntityFramework.Sqlite.csproj
@@ -4,7 +4,7 @@
     <Import Project="..\..\..\..\configureawait.props"/>
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
         <Description>
             Elsa is a set of workflow libraries and tools that enable lean and mean workflowing capabilities in any .NET Core application.
             This package provides the Sqlite EF Core provider for Webhook persistence.
diff --git a/src/activities/webhooks/Elsa.Webhooks.Persistence.MongoDb/Elsa.Webhooks.Persistence.MongoDb.csproj b/src/activities/webhooks/Elsa.Webhooks.Persistence.MongoDb/Elsa.Webhooks.Persistence.MongoDb.csproj
index e1a599a06..27eeee9a2 100644
--- a/src/activities/webhooks/Elsa.Webhooks.Persistence.MongoDb/Elsa.Webhooks.Persistence.MongoDb.csproj
+++ b/src/activities/webhooks/Elsa.Webhooks.Persistence.MongoDb/Elsa.Webhooks.Persistence.MongoDb.csproj
@@ -4,7 +4,7 @@
     <Import Project="..\..\..\..\configureawait.props" />
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
         <Description>
             Elsa is a set of workflow libraries and tools that enable lean and mean workflowing capabilities in any .NET Core application.
             This package provides the MongoDB provider for Webhook persistence.
diff --git a/src/activities/webhooks/Elsa.Webhooks.Persistence.YesSql/Elsa.Webhooks.Persistence.YesSql.csproj b/src/activities/webhooks/Elsa.Webhooks.Persistence.YesSql/Elsa.Webhooks.Persistence.YesSql.csproj
index 9ed7138ef..13ae3d664 100644
--- a/src/activities/webhooks/Elsa.Webhooks.Persistence.YesSql/Elsa.Webhooks.Persistence.YesSql.csproj
+++ b/src/activities/webhooks/Elsa.Webhooks.Persistence.YesSql/Elsa.Webhooks.Persistence.YesSql.csproj
@@ -4,7 +4,7 @@
     <Import Project="..\..\..\..\configureawait.props" />
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
         <Description>
             Elsa is a set of workflow libraries and tools that enable lean and mean workflowing capabilities in any .NET Core application.
             This package provides the YesSQL provider for Webhook persistence.