diff --git a/Casks/firefox.rb b/Casks/firefox.rb
index f06a492cd76..4e23fbd7445 100644
--- a/Casks/firefox.rb
+++ b/Casks/firefox.rb
@@ -1,7 +1,7 @@
 class Firefox < Cask
-  url 'http://download.cdn.mozilla.net/pub/mozilla.org/firefox/releases/22.0/mac/en-US/Firefox%2022.0.dmg'
+  url 'https://download.mozilla.org/?product=firefox-latest&os=osx&lang=en-US'
   homepage 'https://www.mozilla.org/en-US/firefox/'
-  version '22.0'
-  sha1 '45ef69d4254c725114c3fa8ffc5e5bef331e46bd'
+  version 'latest'
+  no_checksum
   link 'Firefox.app'
 end