diff --git a/.github/workflows/ARM.yml b/.github/workflows/ARM.yml
index eef0e666d..161d5b1f6 100644
--- a/.github/workflows/ARM.yml
+++ b/.github/workflows/ARM.yml
@@ -14,12 +14,12 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: '6.0.x'
+          dotnet-version: '9.0.x'
 
       - name: Clean previous install
         run: |
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8485189e1..9c4364aaa 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -50,12 +50,12 @@ jobs:
           mono-version: latest
 
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: '6.0.x'
+          dotnet-version: '9.0.x'
 
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v2
diff --git a/.github/workflows/nuget-preview.yml b/.github/workflows/nuget-preview.yml
index d652f4b1e..3519dec9d 100644
--- a/.github/workflows/nuget-preview.yml
+++ b/.github/workflows/nuget-preview.yml
@@ -21,12 +21,12 @@ jobs:
           echo "DATE_VER=$(date "+%Y-%m-%d")" >> $GITHUB_ENV
 
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: '6.0.x'
+          dotnet-version: '9.0.x'
 
       - name: Set up Python 3.8
         uses: actions/setup-python@v2
diff --git a/src/embed_tests/Python.EmbeddingTest.csproj b/src/embed_tests/Python.EmbeddingTest.csproj
index 4993994d3..1bc7a5115 100644
--- a/src/embed_tests/Python.EmbeddingTest.csproj
+++ b/src/embed_tests/Python.EmbeddingTest.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net6.0</TargetFrameworks>
+    <TargetFrameworks>net472;net9.0</TargetFrameworks>
     <AssemblyOriginatorKeyFile>..\pythonnet.snk</AssemblyOriginatorKeyFile>
     <SignAssembly>true</SignAssembly>
   </PropertyGroup>
diff --git a/src/python_tests_runner/Python.PythonTestsRunner.csproj b/src/python_tests_runner/Python.PythonTestsRunner.csproj
index 63981c424..d1566dd1c 100644
--- a/src/python_tests_runner/Python.PythonTestsRunner.csproj
+++ b/src/python_tests_runner/Python.PythonTestsRunner.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net6.0</TargetFrameworks>
+    <TargetFrameworks>net472;net9.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/testing/Python.Test.csproj b/src/testing/Python.Test.csproj
index 3adc5c0c6..0f882e99c 100644
--- a/src/testing/Python.Test.csproj
+++ b/src/testing/Python.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net9.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
     <AssemblyOriginatorKeyFile>..\pythonnet.snk</AssemblyOriginatorKeyFile>