diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bf71686c..8f8ef095 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -45,6 +45,8 @@ jobs:
       uses: actions/upload-artifact@v4
       with:
         name: nupkg
-        path: ./src/GeoJSON.Net/bin/Release/*.nupkg
+        path: |
+          ./src/GeoJSON.Net/bin/Release/*.nupkg
+          ./src/GeoJSON.Net/bin/Release/*.snupkg
     - name: Test
       run: dotnet test src/GeoJSON.Net.sln --no-restore --verbosity normal
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e1aa176c..ebce6819 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1,21 +1,21 @@
-name: 'Release' 
+name: 'Release'
 
 on:
   release:
-    types: 
+    types:
       - published
 
 env:
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
   DOTNET_CLI_TELEMETRY_OPTOUT: true
-  
+
   # Project name to pack and publish
   PROJECT_NAME: GeoJSON.Net
 
    # Official NuGet Feed settings
   NUGET_FEED: https://api.nuget.org/v3/index.json
   NUGET_KEY: ${{ secrets.NUGET_KEY }}
-  NUGET_VERSIONING_REGEX: "[0-9]+\\.[0-9]+\\.[0-9]+(-[a-zA-Z]+)?"  
+  NUGET_VERSIONING_REGEX: "[0-9]+\\.[0-9]+\\.[0-9]+(-[a-zA-Z]+)?"
 
 jobs:
   deploy:
@@ -35,16 +35,11 @@ jobs:
           }
           echo "Version to use is - $VERSION"
           echo "RELEASE_VERSION=$VERSION" | Out-File -FilePath ${env:GITHUB_ENV} -Append
-      - uses: actions/checkout@v2 
+      - uses: actions/checkout@v4
       - name: Setup .NET Core
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: |
-            3.1.x
-            5.0.x
-            6.0.x
-            7.0.x
-            8.0.x
+          dotnet-version: '8.0.x'
       - name: Install dependencies
         run: dotnet restore src/${{ env.PROJECT_NAME }}.sln
       - name: Build solution
diff --git a/README.md b/README.md
index 02736079..ce8c8421 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ If you still need to use Newtonsoft.Json in ASP.Net Core 3.1+, you must overwrit
 - add "services.AddControllers().AddNewtonsoftJson();" to your service configuration.
 
 ## Contributing
-Highly welcome! Just fork away and send a pull request. We try and review most pull requests within a couple of days. There is now a version 2.0.0 branch. I've created this ready for any breaking changes and any extra features and would encourage anything that isn't a bug fix to go in there.
+Highly welcome! Just fork away and send a pull request. We try and review most pull requests within a couple of days.
 
 ## Thanks
 This library would be NOTHING without its [contributors](https://github.com/GeoJSON-Net/GeoJSON.Net/graphs/contributors) - thanks so much!!
diff --git a/ReleaseNotes.md b/ReleaseNotes.md
new file mode 100644
index 00000000..9c3642c5
--- /dev/null
+++ b/ReleaseNotes.md
@@ -0,0 +1,15 @@
+# Release Notes
+
+## 1.4.0
+
+* Make Feature.properties optional.
+* Make Feature.geometry optional.
+* Update target frameworks (.NET Framework 4.6.2, .NET 6, .NET 8).
+* Update Netwonsoft.Json to 13.0.3.
+
+## 1.3.6
+
+* Fix circular dependency issue.
+* Adding typed FeatureCollection.
+* Add support for .NET 5.
+* Update Netwonsoft.Json to 13.0.1.
diff --git a/src/GeoJSON.Net/GeoJSON.Net.csproj b/src/GeoJSON.Net/GeoJSON.Net.csproj
index c43a150e..40e86023 100644
--- a/src/GeoJSON.Net/GeoJSON.Net.csproj
+++ b/src/GeoJSON.Net/GeoJSON.Net.csproj
@@ -7,6 +7,8 @@
     <Company>GeoJSON.Net</Company>
     <Copyright>Copyright © Joerg Battermann, Matt Hunt, Xavier Fischer, Janus Weil and Contributors, 2014 - 2024</Copyright>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <Version>1.4.0</Version>
     <PackageProjectUrl>https://github.com/GeoJSON-Net/GeoJSON.Net</PackageProjectUrl>
     <RepositoryUrl>https://github.com/GeoJSON-Net/GeoJSON.Net.git</RepositoryUrl>
diff --git a/tools/nuget/NuGet.exe b/tools/nuget/NuGet.exe
deleted file mode 100644
index 34ad49b4..00000000
Binary files a/tools/nuget/NuGet.exe and /dev/null differ