diff --git a/app/serializers/oembed_serializer.rb b/app/serializers/oembed_serializer.rb
index 00ee0ef9..66bdd862 100644
--- a/app/serializers/oembed_serializer.rb
+++ b/app/serializers/oembed_serializer.rb
@@ -4,7 +4,7 @@ class OEmbedSerializer < ActiveModel::Serializer
   include RoutingHelper
   include ActionView::Helpers::TagHelper
 
-  attributes :type, :version, :title
+  attributes :type, :version, :title,
              :provider_name, :provider_url,
              :cache_age, :html, :width, :height