diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 22d6fd7..a06c239 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -123,3 +123,39 @@ jobs:
             dist/*.AppImage
             dist/*.deb
           generate_release_notes: true
+
+  update-cask:
+    needs: release
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          ref: main
+
+      - name: Compute DMG sha256
+        id: sha
+        run: |
+          version="${GITHUB_REF_NAME}"
+          url="https://github.com/${GITHUB_REPOSITORY}/releases/download/${version}/discord-presence-relay-${version}.dmg"
+          curl -sL -o dpr.dmg "$url"
+          echo "value=$(shasum -a 256 dpr.dmg | cut -d ' ' -f1)" >> "$GITHUB_OUTPUT"
+
+      - name: Update cask
+        run: |
+          version="${GITHUB_REF_NAME}"
+          sed -i "s/version \".*\"/version \"${version}\"/" Casks/discord-presence-relay.rb
+          sed -i "s/sha256 \".*\"/sha256 \"${{ steps.sha.outputs.value }}\"/" Casks/discord-presence-relay.rb
+
+      - name: Commit and push
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add Casks/discord-presence-relay.rb
+          git diff --cached --quiet && exit 0
+          git commit -m "Update discord-presence-relay to ${GITHUB_REF_NAME}"
+          git push origin HEAD:main
diff --git a/Casks/discord-presence-relay.rb b/Casks/discord-presence-relay.rb
new file mode 100644
index 0000000..42d78f1
--- /dev/null
+++ b/Casks/discord-presence-relay.rb
@@ -0,0 +1,35 @@
+cask "discord-presence-relay" do
+  version "1.2.0"
+  sha256 "3a7d83639f5f5fb5f9689866c4f96405a36f26bbe92891f444d62ec93df2c134"
+
+  url "https://github.com/YuzuZensai/Discord-RPC-Relay/releases/download/#{version}/discord-presence-relay-#{version}.dmg"
+  name "Discord Presence Relay"
+  desc "Mirrors Discord Rich Presence to every running Discord instance"
+  homepage "https://github.com/YuzuZensai/Discord-RPC-Relay"
+
+  auto_updates false
+  depends_on macos: ">= :big_sur"
+
+  app "Discord Presence Relay.app"
+
+  postflight do
+    system_command "/usr/bin/xattr",
+                    args: ["-cr", "#{appdir}/Discord Presence Relay.app"],
+                    sudo: false
+  end
+
+  zap trash: [
+    "~/Library/Application Support/Discord Presence Relay",
+    "~/Library/Preferences/cafe.kirameki.discord-presence-relay.plist",
+    "~/Library/Saved Application State/cafe.kirameki.discord-presence-relay.savedState"
+  ]
+
+  caveats do
+    <<~EOS
+      #{token} is not notarized. The quarantine attribute is cleared
+      automatically on install; if macOS still refuses to open it
+      ("app is damaged and can't be opened"), run:
+        xattr -cr "#{appdir}/Discord Presence Relay.app"
+    EOS
+  end
+end
diff --git a/README.md b/README.md
index 63195e8..e48c6b8 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,17 @@ settings once it's running.
    discord-presence-relay
    ```
 
-### macOS
+### macOS (Homebrew)
+
+```bash
+brew tap yuzuzensai/discord-rpc-relay https://github.com/YuzuZensai/Discord-RPC-Relay
+brew install --cask discord-presence-relay
+```
+
+The cask clears the Gatekeeper quarantine attribute automatically after
+install, so the app opens normally right away.
+
+### macOS (manual)
 
 1. Download `discord-presence-relay-<version>.dmg` and open it.
 2. Drag **Discord Presence Relay** into the **Applications** folder.
diff --git a/electronBuilder.mjs b/electronBuilder.mjs
index 39f7fe0..0f2660f 100644
--- a/electronBuilder.mjs
+++ b/electronBuilder.mjs
@@ -20,6 +20,7 @@ export default {
   files: [
     '!**/.vscode/*',
     '!src/*',
+    '!Casks/*',
     '!electron.vite.config.{js,ts,mjs,cjs}',
     '!electronBuilder.mjs',
     '!{.eslintcache,eslint.config.mjs,.prettierignore,.prettierrc.yaml,dev-app-update.yml,CHANGELOG.md,README.md}',