diff --git a/src/6pack/6pack.csproj b/src/6pack/6pack.csproj
index 6ba0042..a42a895 100644
--- a/src/6pack/6pack.csproj
+++ b/src/6pack/6pack.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
     <AssemblyName>6pack</AssemblyName>
     <ToolCommandName>6pack</ToolCommandName>
     <PackAsTool>true</PackAsTool>
diff --git a/src/DotFastLZ.Compression/DotFastLZ.Compression.csproj b/src/DotFastLZ.Compression/DotFastLZ.Compression.csproj
index 5206a9a..20b23c0 100644
--- a/src/DotFastLZ.Compression/DotFastLZ.Compression.csproj
+++ b/src/DotFastLZ.Compression/DotFastLZ.Compression.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netstandard2.1;net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netstandard2.1;net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
     <PackageId>DotFastLZ.Compression</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
diff --git a/src/DotFastLZ.Packaging/DotFastLZ.Packaging.csproj b/src/DotFastLZ.Packaging/DotFastLZ.Packaging.csproj
index c51f2ee..b191cdd 100644
--- a/src/DotFastLZ.Packaging/DotFastLZ.Packaging.csproj
+++ b/src/DotFastLZ.Packaging/DotFastLZ.Packaging.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netstandard2.1;net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netstandard2.1;net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
     <PackageId>DotFastLZ.Packaging</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
diff --git a/src/DotFastLZ.Resource/DotFastLZ.Resource.csproj b/src/DotFastLZ.Resource/DotFastLZ.Resource.csproj
index 0c96695..49080af 100644
--- a/src/DotFastLZ.Resource/DotFastLZ.Resource.csproj
+++ b/src/DotFastLZ.Resource/DotFastLZ.Resource.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>
 
 </Project>
diff --git a/test/DotFastLZ.Compression.Tests/DotFastLZ.Compression.Tests.csproj b/test/DotFastLZ.Compression.Tests/DotFastLZ.Compression.Tests.csproj
index 9a80727..cd2d134 100644
--- a/test/DotFastLZ.Compression.Tests/DotFastLZ.Compression.Tests.csproj
+++ b/test/DotFastLZ.Compression.Tests/DotFastLZ.Compression.Tests.csproj
@@ -1,16 +1,16 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <IsTestProject>true</IsTestProject>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
-    <PackageReference Include="NUnit" Version="4.1.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-    <PackageReference Include="NUnit.Analyzers" Version="4.2.0">
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="NUnit" Version="4.2.2" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+    <PackageReference Include="NUnit.Analyzers" Version="4.4.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
diff --git a/test/DotFastLZ.Packaging.Tests/DotFastLZ.Packaging.Tests.csproj b/test/DotFastLZ.Packaging.Tests/DotFastLZ.Packaging.Tests.csproj
index 52a2436..8ce30e4 100644
--- a/test/DotFastLZ.Packaging.Tests/DotFastLZ.Packaging.Tests.csproj
+++ b/test/DotFastLZ.Packaging.Tests/DotFastLZ.Packaging.Tests.csproj
@@ -1,16 +1,16 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <IsTestProject>true</IsTestProject>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
-    <PackageReference Include="NUnit" Version="4.1.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-    <PackageReference Include="NUnit.Analyzers" Version="4.2.0">
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="NUnit" Version="4.2.2" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+    <PackageReference Include="NUnit.Analyzers" Version="4.4.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>