diff --git a/Casks/l/lighttable.rb b/Casks/l/lighttable.rb
index 9176c86655..2284bbf0a8 100644
--- a/Casks/l/lighttable.rb
+++ b/Casks/l/lighttable.rb
@@ -8,6 +8,8 @@ cask "lighttable" do
   desc "IDE"
   homepage "http://lighttable.com/"
 
+  deprecate! date: "2024-01-06", because: :discontinued
+
   app "lighttable-#{version}-mac/LightTable.app"
   binary "lighttable-#{version}-mac/light"