diff --git a/DTstrap/DTstrap.csproj b/DTstrap/DTstrap.csproj
index 4e3b33e..fcf930a 100644
--- a/DTstrap/DTstrap.csproj
+++ b/DTstrap/DTstrap.csproj
@@ -65,7 +65,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="WPF-UI" Version="2.1.0" />
+    <PackageReference Include="WPF-UI" Version="4.2.0" />
   </ItemGroup>
 
   <ItemGroup>