macOS Sierra Notification Center Widgets

Recently released macOS Sierra has a new light background in the notification center. If you have today widgets in your applications, they can be presented not good in the new OS. You can see widget from my iOS app:

So, how to resolve this issues?
It’s easy. You need just to add the following parameters to Info.plist:

<key>NSExtension</key>
<dict>
<key>NSExtensionAttributes</key>
<dict>
<key>NSExtensionPointVersion</key>
<string>2.0</string>
</dict>
</dict>

And result will be with light background:

Also you can follow this thread in the Apple forum.