diff --git a/Casks/firefox-ja.rb b/Casks/firefox-ja.rb
index d3c7f4da0..c57ec4b57 100644
--- a/Casks/firefox-ja.rb
+++ b/Casks/firefox-ja.rb
@@ -5,5 +5,5 @@ class FirefoxJa < Cask
   url 'https://download.mozilla.org/?product=firefox-latest&os=osx&lang=ja-JP-mac'
   homepage 'http://www.mozilla.jp/firefox/'
 
-  link 'Firefox.app'
+  app 'Firefox.app'
 end