diff --git a/Casks/psi.rb b/Casks/psi.rb
index 13d62092398..538f579c5a0 100644
--- a/Casks/psi.rb
+++ b/Casks/psi.rb
@@ -1,4 +1,4 @@
-class Psi < Cask
+cask :v1 => 'psi' do
   version '0.15'
   sha256 '76d50b5314d0a7d9f9a0a71d90e0f806f2da25436135dbd90bd1959286747742'