diff --git a/VRCOSC.Desktop/VRCOSC.Desktop.csproj b/VRCOSC.Desktop/VRCOSC.Desktop.csproj
index 19b540f5..a8ed147a 100644
--- a/VRCOSC.Desktop/VRCOSC.Desktop.csproj
+++ b/VRCOSC.Desktop/VRCOSC.Desktop.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
-    <TargetFramework>net7.0-windows10.0.22000.0</TargetFramework>
+    <TargetFramework>net6.0-windows10.0.22000.0</TargetFramework>
     <OutputType>Exe</OutputType>
     <AssemblyName>VRCOSC</AssemblyName>
     <ApplicationIcon>game.ico</ApplicationIcon>
diff --git a/VRCOSC.Game.Tests/VRCOSC.Game.Tests.csproj b/VRCOSC.Game.Tests/VRCOSC.Game.Tests.csproj
index bd52c8a8..ba39700d 100644
--- a/VRCOSC.Game.Tests/VRCOSC.Game.Tests.csproj
+++ b/VRCOSC.Game.Tests/VRCOSC.Game.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net7.0-windows10.0.22000.0</TargetFramework>
+    <TargetFramework>net6.0-windows10.0.22000.0</TargetFramework>
     <GenerateProgramFile>false</GenerateProgramFile>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/VRCOSC.Game/VRCOSC.Game.csproj b/VRCOSC.Game/VRCOSC.Game.csproj
index 195961f8..7d7677f6 100644
--- a/VRCOSC.Game/VRCOSC.Game.csproj
+++ b/VRCOSC.Game/VRCOSC.Game.csproj
@@ -1,8 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net7.0-windows10.0.22000.0</TargetFramework>
+    <TargetFramework>net6.0-windows10.0.22000.0</TargetFramework>
     <Nullable>enable</Nullable>
-    <LangVersion>11</LangVersion>
+    <LangVersion>10</LangVersion>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\VRCOSC.OSC\VRCOSC.OSC.csproj" />
diff --git a/VRCOSC.OSC/VRCOSC.OSC.csproj b/VRCOSC.OSC/VRCOSC.OSC.csproj
index 2fad270d..b1fb918d 100644
--- a/VRCOSC.OSC/VRCOSC.OSC.csproj
+++ b/VRCOSC.OSC/VRCOSC.OSC.csproj
@@ -1,9 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net7.0-windows10.0.22000.0</TargetFramework>
+        <TargetFramework>net6.0-windows10.0.22000.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
+        <LangVersion>10</LangVersion>
     </PropertyGroup>
 
 </Project>
diff --git a/global.json b/global.json
new file mode 100644
index 00000000..9e5e1fd1
--- /dev/null
+++ b/global.json
@@ -0,0 +1,7 @@
+{
+  "sdk": {
+    "version": "6.0.0",
+    "rollForward": "latestMajor",
+    "allowPrerelease": true
+  }
+}
\ No newline at end of file