Krispy Kreme is rolling out a new treat for Halloween celebrations—the Krispy Skremes. On October 31, customers can get a free treat at participating Krispy Kreme U.S. and Canada locations.

Guests can come in costume to get a free Halloween-themed Pumpkin Spice or Pumpkin Cheesecake doughnut, with no purchase necessary. The promotion will run only on Halloween while supplies last and is limited to one doughnut per customer.

The new KrispySkremes.com website features spooky short films created by Krispy Kreme Production. After watching, Krispy Kreme invites fans to show off their best screams on Vine or Instagram using the #krispyskremes hashtag.