diff --git a/Casks/firefox-aurora.rb b/Casks/firefox-aurora.rb
index 9dcb4251f..60c171cbd 100644
--- a/Casks/firefox-aurora.rb
+++ b/Casks/firefox-aurora.rb
@@ -1,7 +1,7 @@
 class FirefoxAurora < Cask
-  url 'https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-aurora/firefox-31.0a2.en-US.mac.dmg'
+  url 'https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-aurora/firefox-32.0a2.en-US.mac.dmg'
   homepage 'https://www.mozilla.org/en-US/firefox/aurora/'
-  version '31.0a2'
+  version '32.0a2'
   sha256 :no_check
   link 'FirefoxAurora.app'
 end
diff --git a/Casks/firefox-nightly.rb b/Casks/firefox-nightly.rb
index 0d2f89042..7da77c8f2 100644
--- a/Casks/firefox-nightly.rb
+++ b/Casks/firefox-nightly.rb
@@ -1,7 +1,7 @@
 class FirefoxNightly < Cask
-  url 'http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/firefox-32.0a1.en-US.mac.dmg'
+  url 'http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/firefox-33.0a1.en-US.mac.dmg'
   homepage 'https://nightly.mozilla.org/'
-  version '32.0a1'
+  version '33.0a1'
   sha256 :no_check
   link 'FirefoxNightly.app'
 end