diff --git a/lib/tracker_api/resources/epic.rb b/lib/tracker_api/resources/epic.rb
index 18c1277..3f786a9 100644
--- a/lib/tracker_api/resources/epic.rb
+++ b/lib/tracker_api/resources/epic.rb
@@ -17,6 +17,7 @@ class Epic
       attribute :name, String
       attribute :project_id, Integer
       attribute :updated_at, DateTime
+      attribute :completed_at, DateTime
       attribute :url, String
 
       class UpdateRepresenter < Representable::Decorator