diff --git a/Directory.Build.props b/Directory.Build.props
index 767a2516b..5d0198439 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -26,7 +26,7 @@
     <DebugSymbols>true</DebugSymbols>
 
     <IsShipping>true</IsShipping>
-    <CoreSdkTargetFramework>net8.0</CoreSdkTargetFramework>
+    <CoreSdkTargetFramework>net9.0</CoreSdkTargetFramework>
 
     <!-- MSB3243 and MSB3247 fire when attempting to resolve references to the same assembly from different cultures.
          This is a prevalent problem in building the precomputed assembly reference cache. Limiting the assemblies resolved
diff --git a/TestAssets/TestProjects/UseCswinrt/consolecswinrt.csproj b/TestAssets/TestProjects/UseCswinrt/consolecswinrt.csproj
index 35e8e88e2..6ed44942b 100644
--- a/TestAssets/TestProjects/UseCswinrt/consolecswinrt.csproj
+++ b/TestAssets/TestProjects/UseCswinrt/consolecswinrt.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
 		<OutputType>Exe</OutputType>
-		<TargetFramework>net8.0</TargetFramework>
+		<TargetFramework>net9.0</TargetFramework>
 		<TargetPlatformIdentifier>Windows</TargetPlatformIdentifier>
 	</PropertyGroup>
 </Project>
diff --git a/global.json b/global.json
index 44e4a3092..90294e2ad 100644
--- a/global.json
+++ b/global.json
@@ -1,6 +1,6 @@
 {
   "tools": {
-    "dotnet": "8.0.100-rc.1.23463.5",
+    "dotnet": "9.0.100-alpha.1.23511.2",
     "runtimes": {
       "dotnet": [
         "$(VSRedistCommonNetCoreSharedFrameworkx6490PackageVersion)",
diff --git a/src/redist/targets/Crossgen.targets b/src/redist/targets/Crossgen.targets
index 3b35e3233..9d43d4a29 100644
--- a/src/redist/targets/Crossgen.targets
+++ b/src/redist/targets/Crossgen.targets
@@ -37,7 +37,7 @@
          no that we do not silently miss cross-genning some bits. When a TFM for a tool is updated,
          update its path explicitly. If all TFMs match, update DefaultToolTfm -->
     <PropertyGroup>
-      <DefaultToolTfm>net8.0</DefaultToolTfm>
+      <DefaultToolTfm>net9.0</DefaultToolTfm>
 
       <NetSdkTools>$(SdkOutputDirectory)Sdks\Microsoft.NET.Sdk\tools\$(DefaultToolTfm)\</NetSdkTools>
       <BlazorWasmTools>$(SdkOutputDirectory)Sdks\Microsoft.NET.Sdk.BlazorWebAssembly\tools\$(DefaultToolTfm)\</BlazorWasmTools>