diff --git a/app/serializers/rest/preview_card_serializer.rb b/app/serializers/rest/preview_card_serializer.rb
index 81ffa5a5..9d0d0db2 100644
--- a/app/serializers/rest/preview_card_serializer.rb
+++ b/app/serializers/rest/preview_card_serializer.rb
@@ -6,7 +6,7 @@ class REST::PreviewCardSerializer < ActiveModel::Serializer
   attributes :id, :url, :title, :description, :type,
              :author_name, :author_url, :provider_name,
              :provider_url, :html, :width, :height,
-             :image, :embed_url
+             :image, :embed_url, :updated_at
 
   def image
     object.image? ? full_asset_url(object.image.url(:original)) : nil