diff --git a/.github/workflows/CI-CD.yml b/.github/workflows/CI-CD.yml
index 943fcde..f227718 100644
--- a/.github/workflows/CI-CD.yml
+++ b/.github/workflows/CI-CD.yml
@@ -21,13 +21,15 @@ jobs:
     - name: Install .NET Core
       uses: actions/setup-dotnet@3e891b0cb619bf60e2c25674b222b8940e2c1c25 # v4.1.0
       with:
-        dotnet-version: 6.0.x
+        dotnet-version: 8.0.x
 
     - name: Restore Windows
-      run: dotnet restore --runtime=win10-x64
+      run: dotnet restore --runtime=win-x64
 
-    - name: Build Windows
-      run: dotnet build IdlImpTool --no-restore --runtime=win10-x64
+    - name: Build & Test Windows
+      run: |
+        dotnet build IdlImpTool --no-restore --runtime=win-x64
+        dotnet test IdlImporterTests
 
     - name: Restore Linux
       run: dotnet restore --runtime=linux-x64
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 665601d..75c4880 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,7 +14,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Security
 -->
 
-## [Unreleased]
+## [4.0.0] - 2024-11-22
+
+- Add net4.6.2 and net8.0 support
+- Drop net5.0, netcore3.1, and net4.6.1 support
+- Update dependencies
 
 ## [3.0.1] - 2022-09-08
 
diff --git a/Directory.Build.props b/Directory.Build.props
index 3d09ffa..98a3c59 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <TargetFrameworks>net461;netstandard2.0;net5.0</TargetFrameworks>
+    <TargetFrameworks>net462;netstandard2.0;net8.0</TargetFrameworks>
     <RootNamespace>SIL.IDLImporterTool</RootNamespace>
     <Configurations>Debug;Release</Configurations>
     <Company>SIL International</Company>
diff --git a/IDLImporterTests/IDLImporterTests.csproj b/IDLImporterTests/IDLImporterTests.csproj
index edbae2d..f5214d2 100644
--- a/IDLImporterTests/IDLImporterTests.csproj
+++ b/IDLImporterTests/IDLImporterTests.csproj
@@ -1,7 +1,6 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461</TargetFrameworks>
     <AssemblyTitle>IDLImporterTests</AssemblyTitle>
     <PackageId>SIL.IdlImporter.Tests</PackageId>
     <IsPackable>false</IsPackable>
@@ -9,7 +8,9 @@
 
   <ItemGroup>
     <PackageReference Include="GitVersion.MsBuild" Version="5.12.0" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageReference Include="SIL.ReleaseTasks" Version="3.0.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
   </ItemGroup>
diff --git a/IdlImpTool/IDLImp.csproj b/IdlImpTool/IDLImp.csproj
index 8d17f93..bf5607d 100644
--- a/IdlImpTool/IDLImp.csproj
+++ b/IdlImpTool/IDLImp.csproj
@@ -1,9 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
     <OutputType>Exe</OutputType>
-    <RuntimeIdentifiers>win10-x64;linux-x64</RuntimeIdentifiers>
+    <TargetFrameworks>net8.0</TargetFrameworks>
+    <RuntimeIdentifiers>win-x64;linux-x64</RuntimeIdentifiers>
     <AssemblyTitle>IDLImp</AssemblyTitle>
     <Description>Imports the COM interfaces from an IDL file for use with .NET. Can handle c-style arrays and OLECHAR pointers.</Description>
     <PackAsTool>true</PackAsTool>
diff --git a/IdlImporter.sln b/IdlImporter.sln
index 5992912..d62fc63 100644
--- a/IdlImporter.sln
+++ b/IdlImporter.sln
@@ -1,19 +1,23 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IDLImporter", "IDLImporter\IDLImporter.csproj", "{D23CFDE1-DF89-433E-BE88-6C08279F7349}"
+# Visual Studio Version 17
+VisualStudioVersion = 17.11.35327.3
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "IDLImporter", "IDLImporter\IDLImporter.csproj", "{D23CFDE1-DF89-433E-BE88-6C08279F7349}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IDLImp", "IdlImpTool\IDLImp.csproj", "{B5904870-00F3-4833-A981-E22B79A16106}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "IDLImp", "IdlImpTool\IDLImp.csproj", "{B5904870-00F3-4833-A981-E22B79A16106}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IDLImporterTests", "IDLImporterTests\IDLImporterTests.csproj", "{6E18BE34-1CF5-48EA-9C47-F0E89A32E648}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "IDLImporterTests", "IDLImporterTests\IDLImporterTests.csproj", "{6E18BE34-1CF5-48EA-9C47-F0E89A32E648}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "SolutionFolder", "SolutionFolder", "{17449FC8-15AE-49B9-9DEA-22AAFF0F9285}"
-ProjectSection(SolutionItems) = preProject
-	README.md = README.md
-	GitVersion.yml = GitVersion.yml
-	CHANGELOG.md = CHANGELOG.md
-	.gitignore = .gitignore
-	.editorconfig = .editorconfig
-EndProjectSection
+	ProjectSection(SolutionItems) = preProject
+		.editorconfig = .editorconfig
+		.gitignore = .gitignore
+		CHANGELOG.md = CHANGELOG.md
+		Directory.Build.props = Directory.Build.props
+		GitVersion.yml = GitVersion.yml
+		README.md = README.md
+	EndProjectSection
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -34,4 +38,7 @@ Global
 		{6E18BE34-1CF5-48EA-9C47-F0E89A32E648}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{6E18BE34-1CF5-48EA-9C47-F0E89A32E648}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
 EndGlobal
diff --git a/README.md b/README.md
index d071efe..6725f55 100644
--- a/README.md
+++ b/README.md
@@ -17,3 +17,19 @@ Install the [SIL.IdlImporter](https://www.nuget.org/packages/SIL.IdlImporter) nu
 dotnet restore
 dotnet build
 ```
+
+## Testing Locally
+
+### Unit testing
+```bash
+dotnet test
+```
+
+### Using your local changes
+```bash
+dotnet pack
+dotnet tool uninstall -g SIL.IdlImporter.Tool
+dotnet tool install -g --add-source output SIL.IdlImporter.Tool --version [new version]
+```
+Note: If you are testing with FieldWorks you should make this change in the BuildInclude.targets in the ViewsInterfaces project
+