diff --git a/Casks/firefox-nightly.rb b/Casks/firefox-nightly.rb
index 903702251..83c013ca5 100644
--- a/Casks/firefox-nightly.rb
+++ b/Casks/firefox-nightly.rb
@@ -5,5 +5,5 @@ class FirefoxNightly < Cask
   url 'http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/firefox-34.0a1.en-US.mac.dmg'
   homepage 'https://nightly.mozilla.org/'
 
-  link 'FirefoxNightly.app'
+  app 'FirefoxNightly.app'
 end