diff --git a/.github/workflows/ReleaseNotes.md b/.github/workflows/ReleaseNotes.md
index aab7f1e8..8a10727a 100644
--- a/.github/workflows/ReleaseNotes.md
+++ b/.github/workflows/ReleaseNotes.md
@@ -1 +1,4 @@
-* [Client] Restored _Server_ and _Port_ behavior of client options (#2005).
+* nuget: Changed code signing and nuget certificate (**BREAKING CHANGE**).
+* TopicTemplates: Updated samples, parameter validation (#2022).
+* ManagedClient: Switch SubscribeAsync/UnsubscribeAsync to IEnumerable<string> (#2026).
+* Server: Fix _LoadingRetainedMessageAsync_ not executed (#2025).
\ No newline at end of file
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5813f5bd..da2e1956 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,7 +3,7 @@ name: CI
 on: [push, pull_request]
 
 env:
-  VERSION: "4.3.6.${{github.run_number}}"
+  VERSION: "4.3.7.${{github.run_number}}"
 
 jobs:
   build:
@@ -17,7 +17,7 @@ jobs:
           sdk-version: 18362
 
       - name: Setup .NET SDK
-        uses: actions/setup-dotnet@v1.9.0
+        uses: actions/setup-dotnet@v4
         with:
           dotnet-version: |
             3.1.x
@@ -28,7 +28,7 @@ jobs:
         uses: microsoft/setup-msbuild@v1.1
 
       - name: Checkout Code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Signing Certificate
         run: |
@@ -42,14 +42,6 @@ jobs:
       - name: Build solution
         run: msbuild MQTTnet.sln /t:Build /p:Configuration="Release" /verbosity:m /p:FileVersion=${{ env.VERSION }} /p:AssemblyVersion=${{ env.VERSION }} /p:PackageVersion=${{ env.VERSION }} /p:SignAssembly=true /p:AssemblyOriginatorKeyFile=${{ github.workspace }}\certificate.snk
 
-      - name: Collect nuget Packages
-        uses: actions/upload-artifact@v2
-        with:
-          name: nuget Packages
-          path: |
-            **\*.nupkg
-            **\*.snupkg
-
       - name: Setup VSTest
         uses: darenm/Setup-VSTest@v1
 
@@ -59,6 +51,32 @@ jobs:
       - name: ASP.NET Tests
         run: vstest.console.exe Source\MQTTnet.AspNetCore.Tests\bin\Release\netcoreapp3.1\MQTTnet.AspNetCore.Tests.dll
 
+      - name: Install sign CLI tool
+        run: dotnet tool install --tool-path . sign --version 0.9.0-beta.23127.3
+
+      - name: Sign nugets
+        shell: pwsh
+        run: >
+          ./sign code azure-key-vault `
+          "**/*.nupkg" `
+          --base-directory "${{ github.workspace }}/Source" `
+          --publisher-name "MQTTnet" `
+          --description "MQTTnet" `
+          --description-url "https://github.com/dotnet/MQTTnet" `
+          --azure-key-vault-tenant-id "${{ secrets.AZURE_TENANT_ID }}" `
+          --azure-key-vault-client-id "${{ secrets.AZURE_CLIENT_ID }}" `
+          --azure-key-vault-client-secret "${{ secrets.AZURE_CLIENT_SECRET }}" `
+          --azure-key-vault-certificate "${{ secrets.KEY_VAULT_CERTIFICATE_ID }}" `
+          --azure-key-vault-url "${{ secrets.KEY_VAULT_URL }}"
+
+      - name: Upload signed nuget packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: signed-nugets
+          path: |
+            ${{ github.workspace }}/Source/**/*.nupkg
+            ${{ github.workspace }}/Source/**/*.snupkg
+
       - name: Publish MyGet nugets
         if: ${{ github.event_name == 'push' }}
-        run: dotnet nuget push **/*.nupkg -k ${{ secrets.MYGET_API_KEY }} -s https://www.myget.org/F/mqttnet/api/v3/index.json --skip-duplicate
\ No newline at end of file
+        run: dotnet nuget push ${{ github.workspace }}/Source/**/*.nupkg -k ${{ secrets.MYGET_API_KEY }} -s https://www.myget.org/F/mqttnet/api/v3/index.json --skip-duplicate
diff --git a/MQTTnet.sln b/MQTTnet.sln
index 4350c299..c5755c2a 100644
--- a/MQTTnet.sln
+++ b/MQTTnet.sln
@@ -10,6 +10,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		CODE-OF-CONDUCT.md = CODE-OF-CONDUCT.md
 		LICENSE = LICENSE
 		README.md = README.md
+		.github\workflows\ReleaseNotes.md = .github\workflows\ReleaseNotes.md
+		.github\workflows\ci.yml = .github\workflows\ci.yml
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MQTTnet.AspNetCore", "Source\MQTTnet.AspnetCore\MQTTnet.AspNetCore.csproj", "{F10C4060-F7EE-4A83-919F-FF723E72F94A}"