diff --git a/Casks/omnigraffle-professional5.rb b/Casks/omnigraffle-professional5.rb
deleted file mode 100644
index e2bae1b74..000000000
--- a/Casks/omnigraffle-professional5.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-cask 'omnigraffle-professional5' do
-  version '5.4.4'
-  sha256 '396a4adaadb82d651ea6ec8b141c9e5f5b0b5f53c6edee5e7806a896783892c9'
-
-  url "http://www.omnigroup.com/ftp/pub/software/MacOSX/10.6/OmniGrafflePro-#{version}.dmg"
-  homepage 'https://www.omnigroup.com/products/omnigraffle'
-  license :closed
-
-  app 'OmniGraffle Professional 5.app'
-end