diff --git a/app/models/supporter.rb b/app/models/supporter.rb
index af80d25..9232576 100644
--- a/app/models/supporter.rb
+++ b/app/models/supporter.rb
@@ -1,5 +1,6 @@
 class Supporter
   include Mongoid::Document
+  include Mongoid::Timestamps
 
   field :first_name,   type: String
   field :last_name,    type: String