diff --git a/Casks/mono-mdk327.rb b/Casks/mono-mdk327.rb
index 1f0d9ec54..7f78d5398 100644
--- a/Casks/mono-mdk327.rb
+++ b/Casks/mono-mdk327.rb
@@ -1,4 +1,4 @@
-class MonoMdk327 < Cask
+cask :v1 => 'mono-mdk327' do
   version '3.2.7'
   sha256 '261a9ed737f2e8185149857c1a8238bf26a32e7e28ae412c668841fcd77ebfcb'