diff --git a/src/SourceBuild/patches/templating/0001-Set-NETCoreTargetFramework-to-net9.0.patch b/src/SourceBuild/patches/templating/0001-Set-NETCoreTargetFramework-to-net9.0.patch
new file mode 100644
index 000000000..f0d6531ee
--- /dev/null
+++ b/src/SourceBuild/patches/templating/0001-Set-NETCoreTargetFramework-to-net9.0.patch
@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Matt Thalman <mthalman@microsoft.com>
+Date: Tue, 12 Dec 2023 10:49:01 -0600
+Subject: [PATCH] Set NETCoreTargetFramework to net9.0
+
+Backport: https://github.com/dotnet/source-build/issues/3663
+---
+ Directory.Build.props | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Directory.Build.props b/Directory.Build.props
+index 6370d08a9..7292506cd 100644
+--- a/Directory.Build.props
++++ b/Directory.Build.props
+@@ -5,7 +5,7 @@
+ 
+     <PropertyGroup>
+         <LangVersion>preview</LangVersion>
+-        <NETCoreTargetFramework>net8.0</NETCoreTargetFramework>
++        <NETCoreTargetFramework>net9.0</NETCoreTargetFramework>
+         <NETStandardTargetFramework>netstandard2.0</NETStandardTargetFramework>
+         <NETFullTargetFramework>net48</NETFullTargetFramework>
+         <Product>Microsoft .NET Core</Product>