diff --git a/Casks/o/openmsx.rb b/Casks/o/openmsx.rb
index 14916b630acc..ab5ceb8d70d7 100644
--- a/Casks/o/openmsx.rb
+++ b/Casks/o/openmsx.rb
@@ -1,15 +1,25 @@
 cask "openmsx" do
-  version "19_1"
+  version "19.1"
   sha256 "e81a31cd19b1fdf029b08b55879fef6793cb0bbcbdc79e6e4cc8892f64d82d8b"
 
-  url "https://github.com/openMSX/openMSX/releases/download/RELEASE_#{version}/openmsx-#{version.underscores_to_dots}-mac-x86_64-bin.dmg",
+  url "https://github.com/openMSX/openMSX/releases/download/RELEASE_#{version.dots_to_underscores}/openmsx-#{version}-mac-x86_64-bin.dmg",
       verified: "github.com/openMSX/openMSX/"
   name "openMSX"
   desc "MSX emulator"
   homepage "https://openmsx.org/"
 
+  livecheck do
+    url :url
+    regex(/^RELEASE[._-]v?(\d+(?:[._]\d+)+)$/i)
+    strategy :git do |tags, regex|
+      tags.filter_map { |tag| tag[regex, 1]&.tr("_", ".") }
+    end
+  end
+
   app "openMSX.app"
 
+  zap trash: "~/.openMSX"
+
   caveats do
     requires_rosetta
   end