diff --git a/Casks/firefox-beta-de.rb b/Casks/firefox-beta-de.rb
index c2834c0e0..b53eb81ba 100644
--- a/Casks/firefox-beta-de.rb
+++ b/Casks/firefox-beta-de.rb
@@ -1,7 +1,7 @@
 class FirefoxBetaDe < Cask
-  url 'https://download.mozilla.org/?product=firefox-28.0b9&os=osx&lang=de'
+  url 'https://download.mozilla.org/?product=firefox-29.0b1&os=osx&lang=de'
   homepage 'https://www.mozilla.org/de/firefox/beta/'
-  version '28.0b9'
-  sha256 'ffa05b160e4431168f9258982dd705fab8baa5b9607739eafee97cf6698eacca'
+  version '29.0b1'
+  sha256 'b78e825910a7bd21cb4a8d9f395ba22279905473f4759a9c692371562e367694'
   link 'Firefox.app'
 end