diff --git a/.github/autobump.txt b/.github/autobump.txt
index d0dceb14119cd..61dd7721bb7ac 100644
--- a/.github/autobump.txt
+++ b/.github/autobump.txt
@@ -729,6 +729,7 @@ tunnelbear
 tunnelblick@beta
 tuple
 tuta-mail
+twine
 typeface
 typora
 typora@dev
diff --git a/Casks/t/twine.rb b/Casks/t/twine.rb
index 26dd09059bbea..954e421607d6d 100644
--- a/Casks/t/twine.rb
+++ b/Casks/t/twine.rb
@@ -1,6 +1,6 @@
 cask "twine" do
-  version "2.9.0"
-  sha256 "e266539bff4cb605800bbe40ec025dabee324953c370c8743e7b90e1cc973813"
+  version "2.9.1"
+  sha256 "23344fe5707f535ca56bed6dcf9fc56c3fc110576ac19d7e56d576124f94ce24"
 
   url "https://github.com/klembot/twinejs/releases/download/#{version}/Twine-#{version}-macos.dmg",
       verified: "github.com/klembot/twinejs/"
@@ -8,6 +8,8 @@
   desc "Tool for telling interactive, nonlinear stories"
   homepage "https://twinery.org/"
 
+  depends_on macos: ">= :high_sierra"
+
   app "Twine.app"
 
   zap trash: [