diff --git a/app/models/certificate.rb b/app/models/certificate.rb
index aac4e4e..6a33a63 100644
--- a/app/models/certificate.rb
+++ b/app/models/certificate.rb
@@ -8,6 +8,7 @@ class Certificate
   field :issued_by
   field :acquired_date, type: Date
   field :title, as: :slug_title, type: String, localize: true
+  field :rss2_id
 
   belongs_to :member_profile