diff --git a/SampleModule/SampleModule.csproj b/SampleModule/SampleModule.csproj
index 7a8c25a..6135629 100644
--- a/SampleModule/SampleModule.csproj
+++ b/SampleModule/SampleModule.csproj
@@ -7,6 +7,6 @@
     <Copyright>@ nakamurakko</Copyright>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.1" />
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.2" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/WpfMVVM/WpfMVVM.csproj b/WpfMVVM/WpfMVVM.csproj
index b543265..57ae88b 100644
--- a/WpfMVVM/WpfMVVM.csproj
+++ b/WpfMVVM/WpfMVVM.csproj
@@ -8,7 +8,7 @@
     <Copyright>@ nakamurakko</Copyright>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.1" />
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.2" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.5" />
     <PackageReference Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.142" />
   </ItemGroup>