diff --git a/.azure/pipelines/azure-pipelines.yml b/.azure/pipelines/azure-pipelines.yml
index 1440a56..74af8e1 100644
--- a/.azure/pipelines/azure-pipelines.yml
+++ b/.azure/pipelines/azure-pipelines.yml
@@ -34,9 +34,14 @@ steps:
   - task: UseDotNet@2
     displayName: "Use .NET Core sdk 8.x"
     inputs:
-      version: 8.x
+      version: 9.x
       includePreviewVersions: true
 
+  - task: UseDotNet@2
+    displayName: "Use .NET Core sdk 8.x"
+    inputs:
+      version: 8.x
+
   - task: UseDotNet@2
     displayName: "Use .NET Core sdk 7.x"
     inputs:
diff --git a/.github/workflows/dotnet-core.yml b/.github/workflows/dotnet-core.yml
index 724bbd5..aaa60ed 100644
--- a/.github/workflows/dotnet-core.yml
+++ b/.github/workflows/dotnet-core.yml
@@ -16,18 +16,23 @@ jobs:
     name: ${{ matrix.runs-on }}
     runs-on: ${{ matrix.runs-on }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Setup .NET Core 8.0.x, 7.0.x, 6.0.x, 5.0.x and 3.1.x
-        uses: actions/setup-dotnet@v3
+      - name: Setup .NET 8.0.x, 7.0.x, 6.0.x, 5.0.x and 3.1.x
+        uses: actions/setup-dotnet@v4
         with:
           dotnet-version: |
             3.1.x
             5.0.x
             6.0.x
             7.0.x
-            8.0.x-x
+            8.0.x
+      - name: Setup .NET 9.0.x Preview
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 9.0.x
+          dotnet-quality: 'preview'
       - name: dotnet info
         run: dotnet --info
       - name: Install dependencies
diff --git a/samples/ConsoleApp/ConsoleApp.csproj b/samples/ConsoleApp/ConsoleApp.csproj
index 423b004..3bfcf78 100644
--- a/samples/ConsoleApp/ConsoleApp.csproj
+++ b/samples/ConsoleApp/ConsoleApp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net8.0;net7.0;net6.0;net5.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0;net7.0;net6.0;net5.0;netcoreapp3.1</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <CheckEolTargetFramework>false</CheckEolTargetFramework>
   </PropertyGroup>
diff --git a/src/NetLah.Extensions.Configuration/NetLah.Extensions.Configuration.csproj b/src/NetLah.Extensions.Configuration/NetLah.Extensions.Configuration.csproj
index 1994970..34d1cb0 100644
--- a/src/NetLah.Extensions.Configuration/NetLah.Extensions.Configuration.csproj
+++ b/src/NetLah.Extensions.Configuration/NetLah.Extensions.Configuration.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <PackageId>NetLah.Extensions.Configuration</PackageId>
     <PackageTags>appsettings;configuration;configuration-builder;connection-string;extensions;json;ini;xml;environments;command-line-arguments;args;dotnet;netcore;aspnetcore</PackageTags>
-    <TargetFrameworks>net8.0;net7.0;net6.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0;net7.0;net6.0;netstandard2.1</TargetFrameworks>
     <Description>Reusable classes to build application configuration with environmentName such as ConfigurationBuilderBuilder and CertificateLoader</Description>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>../../NetLah.snk</AssemblyOriginatorKeyFile>
diff --git a/test/NetLah.Extensions.Configuration.Test/NetLah.Extensions.Configuration.Test.csproj b/test/NetLah.Extensions.Configuration.Test/NetLah.Extensions.Configuration.Test.csproj
index 5fb5d4f..b6c94c0 100644
--- a/test/NetLah.Extensions.Configuration.Test/NetLah.Extensions.Configuration.Test.csproj
+++ b/test/NetLah.Extensions.Configuration.Test/NetLah.Extensions.Configuration.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net7.0;net6.0;net5.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0;net7.0;net6.0;net5.0;netcoreapp3.1</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>../../NetLah.snk</AssemblyOriginatorKeyFile>