diff --git a/Casks/i/icon-shelf.rb b/Casks/i/icon-shelf.rb
index 212c6af971..17d97c23cf 100644
--- a/Casks/i/icon-shelf.rb
+++ b/Casks/i/icon-shelf.rb
@@ -12,6 +12,7 @@ cask "icon-shelf" do
   homepage "https://icon-shelf.github.io/"
 
   auto_updates true
+  depends_on macos: ">= :catalina"
 
   app "Icon Shelf.app"