diff --git a/ArchUnitNET.MSTestV2Tests/ArchUnitNET.MSTestV2Tests.csproj b/ArchUnitNET.MSTestV2Tests/ArchUnitNET.MSTestV2Tests.csproj
index cc59b648a..d1379a14f 100644
--- a/ArchUnitNET.MSTestV2Tests/ArchUnitNET.MSTestV2Tests.csproj
+++ b/ArchUnitNET.MSTestV2Tests/ArchUnitNET.MSTestV2Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <IsPackable>false</IsPackable>
     <Company>TNG Technology Consulting GmbH</Company>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
diff --git a/ArchUnitNET.NUnitTests/ArchUnitNET.NUnitTests.csproj b/ArchUnitNET.NUnitTests/ArchUnitNET.NUnitTests.csproj
index 03da77d7a..33287f9a6 100644
--- a/ArchUnitNET.NUnitTests/ArchUnitNET.NUnitTests.csproj
+++ b/ArchUnitNET.NUnitTests/ArchUnitNET.NUnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net8.0</TargetFramework>
+        <TargetFramework>net9.0</TargetFramework>
         <IsPackable>false</IsPackable>
         <Company>TNG Technology Consulting GmbH</Company>
         <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
diff --git a/ArchUnitNETTests/ArchUnitNETTests.csproj b/ArchUnitNETTests/ArchUnitNETTests.csproj
index 4f4c6969b..8221226d5 100644
--- a/ArchUnitNETTests/ArchUnitNETTests.csproj
+++ b/ArchUnitNETTests/ArchUnitNETTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <LangVersion>latest</LangVersion>
     <Company>TNG Technology Consulting GmbH</Company>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/ExampleTest/ExampleTest.csproj b/ExampleTest/ExampleTest.csproj
index a54914a9a..b05ac8e13 100644
--- a/ExampleTest/ExampleTest.csproj
+++ b/ExampleTest/ExampleTest.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <Company>TNG Technology Consulting GmbH</Company>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/TestAssemblies/AttributeAssembly/AttributeAssembly.csproj b/TestAssemblies/AttributeAssembly/AttributeAssembly.csproj
index 06fd26909..6a6d87012 100644
--- a/TestAssemblies/AttributeAssembly/AttributeAssembly.csproj
+++ b/TestAssemblies/AttributeAssembly/AttributeAssembly.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
diff --git a/TestAssemblies/DependencyAssembly/DependencyAssembly.csproj b/TestAssemblies/DependencyAssembly/DependencyAssembly.csproj
index 06fd26909..6a6d87012 100644
--- a/TestAssemblies/DependencyAssembly/DependencyAssembly.csproj
+++ b/TestAssemblies/DependencyAssembly/DependencyAssembly.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
diff --git a/TestAssemblies/LoaderTestAssembly/LoaderTestAssembly.csproj b/TestAssemblies/LoaderTestAssembly/LoaderTestAssembly.csproj
index 06fd26909..6a6d87012 100644
--- a/TestAssemblies/LoaderTestAssembly/LoaderTestAssembly.csproj
+++ b/TestAssemblies/LoaderTestAssembly/LoaderTestAssembly.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
diff --git a/TestAssemblies/OtherLoaderTestAssembly/OtherLoaderTestAssembly.csproj b/TestAssemblies/OtherLoaderTestAssembly/OtherLoaderTestAssembly.csproj
index 06fd26909..6a6d87012 100644
--- a/TestAssemblies/OtherLoaderTestAssembly/OtherLoaderTestAssembly.csproj
+++ b/TestAssemblies/OtherLoaderTestAssembly/OtherLoaderTestAssembly.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
diff --git a/TestAssemblies/VisibilityAssembly/VisibilityAssembly.csproj b/TestAssemblies/VisibilityAssembly/VisibilityAssembly.csproj
index 06fd26909..6a6d87012 100644
--- a/TestAssemblies/VisibilityAssembly/VisibilityAssembly.csproj
+++ b/TestAssemblies/VisibilityAssembly/VisibilityAssembly.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
diff --git a/TestAssembly/TestAssembly.csproj b/TestAssembly/TestAssembly.csproj
index 96bd713e5..020dad85b 100644
--- a/TestAssembly/TestAssembly.csproj
+++ b/TestAssembly/TestAssembly.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <TargetFramework>net8.0</TargetFramework>
+        <TargetFramework>net9.0</TargetFramework>
         <LangVersion>Latest</LangVersion>
         <IsPackable>false</IsPackable>
         <Product>TestAssembly</Product>