diff --git a/Casks/guitar-tuner.rb b/Casks/guitar-tuner.rb
index c25e99c8d..8991fb88f 100644
--- a/Casks/guitar-tuner.rb
+++ b/Casks/guitar-tuner.rb
@@ -1,4 +1,4 @@
-class GuitarTuner < Cask
+cask :v1 => 'guitar-tuner' do
   version :latest
   sha256 :no_check