diff --git a/Casks/onyx-snowleopard.rb b/Casks/onyx-snowleopard.rb
index c53a7187f..a2a6e7d33 100644
--- a/Casks/onyx-snowleopard.rb
+++ b/Casks/onyx-snowleopard.rb
@@ -2,6 +2,6 @@ class OnyxSnowleopard < Cask
   url 'http://www.titanium.free.fr/download/106/OnyX.dmg'
   homepage 'http://www.titanium.free.fr/downloadonyx.php'
   version '2.4.0'
-  sha1 '188c15090988b379dce9f0fafa7b686c6eff2ada147cde150b16e1ae01e4e9e4'
+  sha256 '188c15090988b379dce9f0fafa7b686c6eff2ada147cde150b16e1ae01e4e9e4'
   link 'OnyX.app'
 end