diff --git a/CPF.Linux/CPF.Linux.csproj b/CPF.Linux/CPF.Linux.csproj
index 3a54455..5eeb0ff 100644
--- a/CPF.Linux/CPF.Linux.csproj
+++ b/CPF.Linux/CPF.Linux.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-	<TargetFramework>net8.0</TargetFramework>
+	  <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <Version>0.9.6.5</Version>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
     <Authors>QQ:761716178</Authors>
diff --git a/CPF.Mac/CPF.Mac.csproj b/CPF.Mac/CPF.Mac.csproj
index 29d54b5..2c98a36 100644
--- a/CPF.Mac/CPF.Mac.csproj
+++ b/CPF.Mac/CPF.Mac.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+	  <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <Product>QQ:761716178 跨平台UI框架</Product>
     <Version>0.9.6.6</Version>
     <PackageId>Xhm.CPF.Mac</PackageId>
diff --git a/CPF.Razor/CPF.Razor.csproj b/CPF.Razor/CPF.Razor.csproj
index a27d989..d8fb1f7 100644
--- a/CPF.Razor/CPF.Razor.csproj
+++ b/CPF.Razor/CPF.Razor.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+	  <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <LangVersion>9.0</LangVersion>
   </PropertyGroup>
 
diff --git a/CPF.ReoGrid/CPF.ReoGrid.csproj b/CPF.ReoGrid/CPF.ReoGrid.csproj
index 69f199c..7955ec1 100644
--- a/CPF.ReoGrid/CPF.ReoGrid.csproj
+++ b/CPF.ReoGrid/CPF.ReoGrid.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Library</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+	  <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>disable</Nullable>
   </PropertyGroup>
diff --git a/CPF.Skia/CPF.Skia.csproj b/CPF.Skia/CPF.Skia.csproj
index 9860302..eb3fbc7 100644
--- a/CPF.Skia/CPF.Skia.csproj
+++ b/CPF.Skia/CPF.Skia.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+	  <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <Product>QQ:761716178 跨平台UI框架</Product>
     <Version>0.9.6.6</Version>
     <PackageId>Xhm.CPF.Skia</PackageId>
diff --git a/CPF.Windows/CPF.Windows.csproj b/CPF.Windows/CPF.Windows.csproj
index aa7070a..20e4f44 100644
--- a/CPF.Windows/CPF.Windows.csproj
+++ b/CPF.Windows/CPF.Windows.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+	  <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <Product>QQ:761716178 跨平台UI框架</Product>
     <Version>0.9.6.6</Version>
     <PackageId>Xhm.CPF.Windows</PackageId>
diff --git a/CPF/CPF.csproj b/CPF/CPF.csproj
index 71c1271..6200e1e 100644
--- a/CPF/CPF.csproj
+++ b/CPF/CPF.csproj
@@ -1,13 +1,13 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-	  <TargetFramework>net8.0</TargetFramework>
+	  <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <Authors>QQ:761716178</Authors>
     <Company>QQ:761716178</Company>
     <Product>QQ:761716178 跨平台UI框架</Product>
     <Description>CPF(Cross platform UI framework) QQ:761716178 跨平台UI框架  http://cpf.cskin.net/</Description>
     <Version>0.9.6.6</Version>
-    <LangVersion>9.0</LangVersion>
+    <!--<LangVersion>9.0</LangVersion>-->
     <PackageId>Xhm.CPF</PackageId>
     <PackageProjectUrl></PackageProjectUrl>
     <Copyright>Copyright (c) 2020 by http://cpf.cskin.net/</Copyright>