diff --git a/Casks/firefox-nightly-ja.rb b/Casks/firefox-nightly-ja.rb
index dcfbd3abc..77ede8c0b 100644
--- a/Casks/firefox-nightly-ja.rb
+++ b/Casks/firefox-nightly-ja.rb
@@ -5,5 +5,5 @@ class FirefoxNightlyJa < Cask
   url 'https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-central-l10n/firefox-35.0a1.ja-JP-mac.mac.dmg'
   homepage 'https://nightly.mozilla.org/'
 
-  link 'FirefoxNightly.app'
+  app 'FirefoxNightly.app'
 end