diff --git a/app/mailers/organization_notifier.rb b/app/mailers/organization_notifier.rb
index d3ed1fcd..761ebaf3 100644
--- a/app/mailers/organization_notifier.rb
+++ b/app/mailers/organization_notifier.rb
@@ -20,7 +20,7 @@ def new_petition(petition)
     I18n.with_locale(locale) do
       mail(
         subject: 'New Application',
-        to: organization.users.joins(:members).where(members: { manager: true }).pluck(:email).uniq
+        bcc: organization.users.joins(:members).where(members: { manager: true }).pluck(:email).uniq
       )
     end
   end