diff --git a/Casks/gulp.rb b/Casks/gulp.rb
index d173ab6ce7..31728ed6ab 100644
--- a/Casks/gulp.rb
+++ b/Casks/gulp.rb
@@ -3,9 +3,12 @@ cask "gulp" do
   sha256 "59fed5d8c801c9302debf463f2d274404548e23433c965144e69a0b4a2e23851"
 
   url "https://github.com/sindresorhus/gulp-app/releases/download/#{version}/gulp.app.zip"
-  appcast "https://github.com/sindresorhus/gulp-app/releases.atom"
   name "gulp-app"
   homepage "https://github.com/sindresorhus/gulp-app"
 
   app "gulp.app"
+
+  caveats do
+    discontinued
+  end
 end