diff --git a/Casks/firefox-nightly.rb b/Casks/firefox-nightly.rb
index 903702251..60a00bcd3 100644
--- a/Casks/firefox-nightly.rb
+++ b/Casks/firefox-nightly.rb
@@ -2,7 +2,7 @@ class FirefoxNightly < Cask
   version 'latest'
   sha256 :no_check
 
-  url 'http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/firefox-34.0a1.en-US.mac.dmg'
+  url 'http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/firefox-35.0a1.en-US.mac.dmg'
   homepage 'https://nightly.mozilla.org/'
 
   link 'FirefoxNightly.app'