diff --git a/Casks/c/calmly-writer.rb b/Casks/c/calmly-writer.rb
index b51d08a1ab..feced4bf00 100644
--- a/Casks/c/calmly-writer.rb
+++ b/Casks/c/calmly-writer.rb
@@ -25,7 +25,7 @@ cask "calmly-writer" do
     end
   end
 
-  depends_on macos: ">= :sierra"
+  depends_on macos: ">= :high_sierra"
 
   app "Calmly Writer.app"