diff --git a/Casks/d/dia.rb b/Casks/d/dia.rb
index aba5431b4f..089a3b09c3 100644
--- a/Casks/d/dia.rb
+++ b/Casks/d/dia.rb
@@ -8,13 +8,11 @@ cask "dia" do
   desc "Draw structured diagrams"
   homepage "http://dia-installer.de/"
 
+  deprecate! date: "2023-12-17", because: :discontinued
+
   depends_on cask: "xquartz"
 
   app "Dia.app"
 
   # No zap stanza required
-
-  caveats do
-    discontinued
-  end
 end