diff --git a/Casks/kobo-jp.rb b/Casks/kobo-jp.rb
index e3a324bbe..bcadf11b3 100644
--- a/Casks/kobo-jp.rb
+++ b/Casks/kobo-jp.rb
@@ -1,4 +1,4 @@
-class KoboJp < Cask
+cask :v1 => 'kobo-jp' do
   version :latest
   sha256 :no_check