diff --git a/Casks/firefox-nightly.rb b/Casks/firefox-nightly.rb
index 2ede44fe6..bee2e55c7 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-35.0a1.en-US.mac.dmg'
+  url 'https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/firefox-36.0a1.en-US.mac.dmg'
   homepage 'https://nightly.mozilla.org/'
   license :oss