diff --git a/build/NuSpecs/AppxManifest.xml b/build/NuSpecs/AppxManifest.xml
index 1c7856c5d2..65e3d8f7e3 100644
--- a/build/NuSpecs/AppxManifest.xml
+++ b/build/NuSpecs/AppxManifest.xml
@@ -47,12 +47,6 @@
           <ActivatableClass ActivatableClassId="Microsoft.Windows.AppLifecycle.ActivationRegistrationManager" ThreadingModel="both" />
           <ActivatableClass ActivatableClassId="Microsoft.Windows.AppLifecycle.AppInstance" ThreadingModel="both" />
 
-          <!-- AppNotifications -->
-          <ActivatableClass ActivatableClassId="Microsoft.Windows.AppNotifications.AppNotificationManager" ThreadingModel="both" />
-          <ActivatableClass ActivatableClassId="Microsoft.Windows.AppNotifications.AppNotification" ThreadingModel="both" />
-          <ActivatableClass ActivatableClassId="Microsoft.Windows.AppNotifications.AppNotificationProgressData" ThreadingModel="both" />
-          <ActivatableClass ActivatableClassId="Microsoft.Windows.AppNotifications.AppNotificationActivatedEventArgs" ThreadingModel="both" />
-
           <!-- PushNotifications -->
           <ActivatableClass ActivatableClassId="Microsoft.Windows.PushNotifications.PushNotificationChannel" ThreadingModel="both" />
           <ActivatableClass ActivatableClassId="Microsoft.Windows.PushNotifications.PushNotificationCreateChannelResult" ThreadingModel="both" />
@@ -83,9 +77,6 @@
           <ActivatableClass ActivatableClassId="Microsoft.Windows.AppNotifications.Builder.AppNotificationProgressBar" ThreadingModel="both" />
           <ActivatableClass ActivatableClassId="Microsoft.Windows.AppNotifications.Builder.AppNotificationComboBox" ThreadingModel="both" />
 
-          <!-- AccessControl -->
-          <ActivatableClass ActivatableClassId="Microsoft.Windows.Security.AccessControl.SecurityDescriptorHelpers" ThreadingModel="both" />
-
       </InProcessServer>
     </Extension>
   </Extensions>