diff --git a/Casks/firefoxdeveloperedition-ja.rb b/Casks/firefoxdeveloperedition-ja.rb
index 3a4ffa3d4..5119f5398 100644
--- a/Casks/firefoxdeveloperedition-ja.rb
+++ b/Casks/firefoxdeveloperedition-ja.rb
@@ -1,4 +1,4 @@
-class FirefoxdevelopereditionJa < Cask
+cask :v1 => 'firefoxdeveloperedition-ja' do
   version '35.0a2'
   sha256 '3f990fbf7fe911efd27aaa22fae6b7e42f5f132792b08efc90ffa453fb2b6d78'