diff --git a/v2rayN/PacLib/PacLib.csproj b/v2rayN/PacLib/PacLib.csproj
index ed5be34b..606c62e5 100644
--- a/v2rayN/PacLib/PacLib.csproj
+++ b/v2rayN/PacLib/PacLib.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0-windows</TargetFramework>
+    <TargetFramework>net8.0-windows</TargetFramework>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
diff --git a/v2rayN/ProtosLib/ProtosLib.csproj b/v2rayN/ProtosLib/ProtosLib.csproj
index 3abd78a8..83a4ce17 100644
--- a/v2rayN/ProtosLib/ProtosLib.csproj
+++ b/v2rayN/ProtosLib/ProtosLib.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0-windows</TargetFramework>
+    <TargetFramework>net8.0-windows</TargetFramework>
     <Nullable>enable</Nullable>	  
   </PropertyGroup>
 	
diff --git a/v2rayN/v2rayN/v2rayN.csproj b/v2rayN/v2rayN/v2rayN.csproj
index 3995f786..f6f97e0e 100644
--- a/v2rayN/v2rayN/v2rayN.csproj
+++ b/v2rayN/v2rayN/v2rayN.csproj
@@ -3,7 +3,7 @@
 	<PropertyGroup>
 		<GenerateSatelliteAssembliesForCore>true</GenerateSatelliteAssembliesForCore>
 		<OutputType>WinExe</OutputType>
-		<TargetFramework>net6.0-windows</TargetFramework>
+		<TargetFramework>net8.0-windows</TargetFramework>
 		<Nullable>enable</Nullable>
 		<UseWPF>true</UseWPF>  
 		<ApplicationManifest>app.manifest</ApplicationManifest>
@@ -20,6 +20,7 @@
 		<PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
 		<PackageReference Include="QRCoder.Xaml" Version="1.4.3" />
 		<PackageReference Include="sqlite-net-pcl" Version="1.8.116" />
+		<PackageReference Include="System.Text.Json" Version="8.0.0" />
 		<PackageReference Include="TaskScheduler" Version="2.10.1" /> 
 		<PackageReference Include="ZXing.Net.Bindings.Windows.Compatibility" Version="0.16.12" />
 		<PackageReference Include="ReactiveUI.Fody" Version="19.5.39" />
diff --git a/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj b/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj
index 40ddb328..73349b29 100644
--- a/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj
+++ b/v2rayN/v2rayUpgrade/v2rayUpgrade.csproj
@@ -1,9 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-	<TargetFramework>net6.0-windows</TargetFramework>
+	<TargetFramework>net8.0-windows</TargetFramework>
 	<OutputType>WinExe</OutputType>
 	<UseWindowsForms>true</UseWindowsForms>	    
-	<Copyright>Copyright © 2019-2023 (GPLv3)</Copyright>
+	<Copyright>Copyright © 2019-2024 (GPLv3)</Copyright>
 	<FileVersion>1.1.0.0</FileVersion>
 	<ApplicationManifest>app.manifest</ApplicationManifest>
 	<Nullable>enable</Nullable>