diff --git a/Casks/s/sizzy.rb b/Casks/s/sizzy.rb
index dd813feaf2..8d9bc3c058 100644
--- a/Casks/s/sizzy.rb
+++ b/Casks/s/sizzy.rb
@@ -16,6 +16,7 @@ cask "sizzy" do
   end
 
   auto_updates true
+  depends_on macos: ">= :high_sierra"
 
   app "Sizzy.app"