diff --git a/Casks/mailpile.rb b/Casks/mailpile.rb
index c96305a3c..413a686b9 100644
--- a/Casks/mailpile.rb
+++ b/Casks/mailpile.rb
@@ -1,4 +1,4 @@
-class Mailpile < Cask
+cask :v1 => 'mailpile' do
   version :latest
   sha256 :no_check