diff --git a/Casks/tinderbox.rb b/Casks/tinderbox.rb
index fbdfa8ace97..58b9530b83a 100644
--- a/Casks/tinderbox.rb
+++ b/Casks/tinderbox.rb
@@ -1,6 +1,6 @@
 cask "tinderbox" do
-  version "8.9.0"
-  sha256 "1078aa2ccd9247ced13ad26a9c44b12e308c69c497741b447e080aaa12ffd738"
+  version "8.9.1"
+  sha256 "53f416de9f08034c6c20069ae8363b8bc5f228d9c63b462f8c82fb35609f2696"
 
   url "https://www.eastgate.com/download/tbx#{version.no_dots}.dmg"
   appcast "https://eastgate.com/Tinderbox/download.html"