diff --git a/app/serializers/manifest_serializer.rb b/app/serializers/manifest_serializer.rb
index 5604325be..48f3aa7a6 100644
--- a/app/serializers/manifest_serializer.rb
+++ b/app/serializers/manifest_serializer.rb
@@ -35,6 +35,7 @@ class ManifestSerializer < ActiveModel::Serializer
         src: full_pack_url("media/icons/android-chrome-#{size}x#{size}.png"),
         sizes: "#{size}x#{size}",
         type: 'image/png',
+        purpose: 'any maskable',
       }
     end
   end