diff --git a/Test/UnitTests/UnitTests.csproj b/Test/UnitTests/UnitTests.csproj
index 3b5af5d..16a0938 100644
--- a/Test/UnitTests/UnitTests.csproj
+++ b/Test/UnitTests/UnitTests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net462;net9.0-windows</TargetFrameworks>
+    <TargetFrameworks>net462;net8.0-windows</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <UseWPF>true</UseWPF>
     <OutputType>Library</OutputType>
diff --git a/src/Microsoft.Xaml.Behaviors/Microsoft.Xaml.Behaviors.csproj b/src/Microsoft.Xaml.Behaviors/Microsoft.Xaml.Behaviors.csproj
index 870403a..3687cd8 100644
--- a/src/Microsoft.Xaml.Behaviors/Microsoft.Xaml.Behaviors.csproj
+++ b/src/Microsoft.Xaml.Behaviors/Microsoft.Xaml.Behaviors.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net462;net9.0-windows</TargetFrameworks>
+    <TargetFrameworks>net462;net8.0-windows</TargetFrameworks>
     <TargetsForTfmSpecificBuildOutput>$(TargetsForTfmSpecificBuildOutput);IncludeProjectToProjectAssets</TargetsForTfmSpecificBuildOutput>
     <OutputType>Library</OutputType>
     <PackageId>Microsoft.Xaml.Behaviors.Wpf</PackageId>