diff --git a/Casks/firefox-beta-de.rb b/Casks/firefox-beta-de.rb
index 238ef2828..3af553921 100644
--- a/Casks/firefox-beta-de.rb
+++ b/Casks/firefox-beta-de.rb
@@ -1,6 +1,6 @@
 cask :v1 => 'firefox-beta-de' do
-  version '41.0b9'
-  sha256 '72970f3b9562aeff8208f8f3af09f065c4f13a710560890fa916acca5623eff9'
+  version '42.0b8'
+  sha256 'e870a3ce8b9f938d9c59fa349bff7afb719c1d60732abf55749c97cb474090fb'
 
   url "https://download.mozilla.org/?product=firefox-#{version}-SSL&os=osx&lang=de"
   name 'Firefox'