diff --git a/.github/workflows/bump.yml b/.github/workflows/bump.yml
index bff8f1c..695e997 100644
--- a/.github/workflows/bump.yml
+++ b/.github/workflows/bump.yml
@@ -1,4 +1,4 @@
-name: Bump netbird
+name: Bump formulae
 
 on:
   schedule:
@@ -14,7 +14,12 @@ jobs:
     steps:
       - uses: actions/checkout@v7
 
-      - name: Update cask to the latest release
+      - name: Configure git
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+      - name: Update netbird cask to the latest release
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
@@ -54,8 +59,41 @@ jobs:
             sed -i -E "/\/${asset//./\\.}\"/{n;s/[0-9a-f]{64}/${sha[$asset]}/}" "$formula"
           done
           git diff
-
-          git config user.name "github-actions[bot]"
-          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
           git commit -am "chore: bump netbird to $latest"
-          git push
+
+      - name: Update zshellcheck formula
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          set -euo pipefail
+          formula=Formula/zshellcheck.rb
+          repo=afadesigns/zshellcheck
+          latest=$(gh api repos/$repo/releases/latest --jq .tag_name)
+          latest=${latest#v}
+          current=$(sed -nE 's|.*/releases/download/v([^/]+)/.*|\1|p' "$formula" | head -1)
+          if [ "$latest" = "$current" ]; then
+            echo "Already at $current"
+            exit 0
+          fi
+
+          # The release publishes checksums.txt with a sha256 for every asset.
+          if ! checksums=$(curl -fsSL "https://github.com/$repo/releases/download/v$latest/checksums.txt"); then
+            echo "checksums.txt is not published yet"
+            exit 0
+          fi
+          sed -i -E "s|/v${current//./\\.}/|/v$latest/|g" "$formula"
+          for arch in arm64 x86_64; do
+            asset="zshellcheck_Darwin_${arch}.tar.gz"
+            sha=$(awk -v a="$asset" '$2 == a { print $1 }' <<<"$checksums")
+            if [ -z "$sha" ]; then
+              echo "$asset is not published yet"
+              git checkout -- "$formula"
+              exit 0
+            fi
+            sed -i -E "/\/${asset//./\\.}\"/{n;s/[0-9a-f]{64}/$sha/}" "$formula"
+          done
+          git diff
+          git commit -am "chore: bump zshellcheck to $latest"
+
+      - name: Push
+        run: git push
diff --git a/Formula/zshellcheck.rb b/Formula/zshellcheck.rb
new file mode 100644
index 0000000..0771334
--- /dev/null
+++ b/Formula/zshellcheck.rb
@@ -0,0 +1,33 @@
+class Zshellcheck < Formula
+  desc "Static analysis and auto-fix for Zsh scripts"
+  homepage "https://github.com/afadesigns/zshellcheck"
+  license "MIT"
+
+  if Hardware::CPU.arm?
+    url "https://github.com/afadesigns/zshellcheck/releases/download/v1.8.0/zshellcheck_Darwin_arm64.tar.gz"
+    sha256 "180879dc1fcd106dda667efa070af3829a38b736c23df1a6e7d9a527787d4038"
+  else
+    url "https://github.com/afadesigns/zshellcheck/releases/download/v1.8.0/zshellcheck_Darwin_x86_64.tar.gz"
+    sha256 "d097a48e93b7a77f6e0ca3c72a4f6aef9c7330963117fe2b1f394f682a651f6e"
+  end
+
+  livecheck do
+    url :homepage
+    strategy :github_latest
+  end
+
+  depends_on :macos
+
+  def install
+    bin.install "zshellcheck"
+    man1.install "man/man1/zshellcheck.1"
+    bash_completion.install "completions/bash/zshellcheck-completion.bash" => "zshellcheck"
+    zsh_completion.install "completions/zsh/_zshellcheck"
+  end
+
+  test do
+    assert_match version.to_s, shell_output("#{bin}/zshellcheck --version")
+    (testpath/"t.zsh").write "echo $x\n"
+    assert_match "ZC1075", shell_output("#{bin}/zshellcheck t.zsh", 1)
+  end
+end
diff --git a/README.md b/README.md
index 51965a1..9ed5f4d 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@ My personal Homebrew tap for macOS.
 | --- | --- | --- |
 | [`netbird`](https://github.com/netbirdio/netbird) | formula | NetBird CLI and daemon |
 | [`netbird-ui`](https://github.com/netbirdio/netbird) | cask | NetBird menu bar app |
+| [`zshellcheck`](https://github.com/afadesigns/zshellcheck) | formula | Linter for Zsh scripts |
 
 ## Install