diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index ed8ba5e2..e29f25cf 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -40,7 +40,7 @@ jobs:
       uses: actions/setup-dotnet@v4
       if: ${{ matrix.language == 'csharp' }}
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 9.0.x
 
     - name: Autobuild
       uses: github/codeql-action/autobuild@v3
diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index af9a3453..4d6b37b0 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -17,7 +17,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: 9.0.x
       - name: configure aws credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
@@ -44,7 +44,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: 9.0.x
       - name: configure aws credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
diff --git a/.github/workflows/dotnet.yml b/.github/workflows/dotnet.yml
index 5231645d..52dcc231 100644
--- a/.github/workflows/dotnet.yml
+++ b/.github/workflows/dotnet.yml
@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 9.0.x
     - name: Restore dependencies
       run: dotnet restore
     - name: Build
diff --git a/ServiceMonitor.Cleaner/ServiceMonitor.Cleaner.csproj b/ServiceMonitor.Cleaner/ServiceMonitor.Cleaner.csproj
index 76ceb613..de5104a5 100644
--- a/ServiceMonitor.Cleaner/ServiceMonitor.Cleaner.csproj
+++ b/ServiceMonitor.Cleaner/ServiceMonitor.Cleaner.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/ServiceMonitor.Dashboard/ServiceMonitor.Dashboard.csproj b/ServiceMonitor.Dashboard/ServiceMonitor.Dashboard.csproj
index 47b351b6..752abd65 100644
--- a/ServiceMonitor.Dashboard/ServiceMonitor.Dashboard.csproj
+++ b/ServiceMonitor.Dashboard/ServiceMonitor.Dashboard.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
 	<PropertyGroup>
-		<TargetFramework>net8.0</TargetFramework>
+		<TargetFramework>net9.0</TargetFramework>
 		<Nullable>enable</Nullable>
 		<ImplicitUsings>enable</ImplicitUsings>
 	</PropertyGroup>
diff --git a/ServiceMonitor.Mailer/ServiceMonitor.Mailer.csproj b/ServiceMonitor.Mailer/ServiceMonitor.Mailer.csproj
index a80f4649..171d7b6b 100644
--- a/ServiceMonitor.Mailer/ServiceMonitor.Mailer.csproj
+++ b/ServiceMonitor.Mailer/ServiceMonitor.Mailer.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/ServiceMonitor.Test/ServiceMonitor.Test.csproj b/ServiceMonitor.Test/ServiceMonitor.Test.csproj
index 085a3545..3392efbf 100644
--- a/ServiceMonitor.Test/ServiceMonitor.Test.csproj
+++ b/ServiceMonitor.Test/ServiceMonitor.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>