diff --git a/src/ReactiveUI.Blend/ReactiveUI.Blend.csproj b/src/ReactiveUI.Blend/ReactiveUI.Blend.csproj
index 2f854d3e97..8a146baf7c 100644
--- a/src/ReactiveUI.Blend/ReactiveUI.Blend.csproj
+++ b/src/ReactiveUI.Blend/ReactiveUI.Blend.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="MSBuild.Sdk.Extras">
+<Project Sdk="MSBuild.Sdk.Extras">
 
   <PropertyGroup>
     <TargetFrameworks>net462;net472;net6.0-windows10.0.17763.0;net7.0-windows10.0.17763.0</TargetFrameworks>
@@ -21,7 +21,7 @@
 
   <ItemGroup>
     <Compile Include="Platforms\net4\**\*.cs" />
-    <PackageReference Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.39" />
+    <PackageReference Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.77" />
   </ItemGroup>
 
   <ItemGroup>