diff --git a/Casks/jettison.rb b/Casks/jettison.rb
new file mode 100644
index 0000000000..b53009cece
--- /dev/null
+++ b/Casks/jettison.rb
@@ -0,0 +1,26 @@
+cask 'jettison' do
+  version '1.5'
+  sha256 'b502b1b0cd7730eea576fe7f524bd9914c0652dbbb631362300194cbc7f610ce'
+
+  url "https://stclairsoft.com/download/Jettison-#{version}.dmg"
+  appcast 'https://stclairsoft.com/cgi-bin/sparkle.cgi?JT',
+          checkpoint: 'fa83610c6373410e200e1cce210b5611575968e883aa33772bf91b17aaccdc7f'
+  name 'Jettison'
+  name 'St. Clair Software Jettison'
+  homepage 'https://stclairsoft.com/Jettison'
+  license :commercial
+
+  auto_updates true
+
+  app 'Jettison.app'
+
+  uninstall login_item: 'Jettison'
+
+  zap delete: [
+                '~/Library/Application Support/com.apple.sharedfilelist/com.apple.LSSharedFileList.ApplicationRecentDocuments/com.stclairsoft.jettison.sfl',
+                '~/Library/Application Support/Jettison',
+                '~/Library/Preferences/com.stclairsoft.Jettison.plist',
+                '~/Library/Preferences/com.stclairsoft.Jettison.AppStore.plist',
+                '~/Library/Caches/com.stclairsoft.Jettison',
+              ]
+end