diff --git a/.github/actions/zig-update.js b/.github/actions/zig-update.js
new file mode 100644
index 0000000..692ee50
--- /dev/null
+++ b/.github/actions/zig-update.js
@@ -0,0 +1,63 @@
+const https = require("https");
+const fs = require("fs");
+const { execSync, exec } = require("child_process");
+const { Octokit } = require("@octokit/action");
+
+const req = https.get("https://ziglang.org/download/index.json", (res) => {
+  let data = "";
+
+  // A chunk of data has been received.
+  res.on("data", (chunk) => {
+    data += chunk;
+  });
+
+  // The whole response has been received.
+  res.on("end", () => {
+    let res = JSON.parse(data);
+    check(res);
+  });
+});
+
+function check(data) {
+  if (!data.master.version.startsWith("0.12")) {
+    console.error("Zig master is no longer on 0.12, please update");
+    process.exit(1);
+  }
+  const path = "Formula/z/zig@0.12.rb";
+  var file = fs.readFileSync(path).toString();
+  const verMatch = /"[\d.]+[+-\w]+"/;
+  const localVer = file.match(verMatch)[0].replaceAll('"', "");
+  const remoteVer = (() => {
+    let digits = data.master.version.split(/\.|-/);
+    return digits[2] + "." + digits[4];
+  })();
+  if (localVer == remoteVer) return console.log("Nightly is up to date");
+
+  const branchName = `zig_0.12.${remoteVer}`;
+  execSync(`git checkout -b "${branchName}"`);
+
+  file = file.replace(verMatch, `"${remoteVer}"`);
+
+  let replacementIndex = -1;
+  const newSHA = [
+    data.master["aarch64-macos"].shasum,
+    data.master["x86_64-macos"].shasum,
+    data.master["aarch64-linux"].shasum,
+    data.master["x86_64-linux"].shasum,
+  ];
+  file = file.replace(/sha256 "([a-f]|\d)*"/, () => {
+    replacementIndex++;
+    return `sha256 "${newSHA[replacementIndex]}"`;
+  });
+
+  fs.writeFileSync(path, file);
+
+  const octokit = new Octokit();
+  const [owner, repo] = process.env.GITHUB_REPOSITORY.split("/");
+  octokit.git.createCommit({
+    owner,
+    repo,
+    message: `"[Autoupdate]: Sync zig@0.12 to ${remoteVer}"`,
+  });
+  octokit.pulls.create({ owner, repo, base: "main", head: branchName });
+}
diff --git a/.github/workflows/zig-update.yml b/.github/workflows/zig-update.yml
new file mode 100644
index 0000000..33fe549
--- /dev/null
+++ b/.github/workflows/zig-update.yml
@@ -0,0 +1,16 @@
+name: Zig nightly update
+on:
+  schedule:
+    - cron: '16 0 * * *'
+jobs:
+  update-zig:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          version: 12
+      - run: npm install @octokit/action
+      - run: node .github/actions/zig-update.js
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.gitignore b/.gitignore
index e43b0f9..9daa824 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 .DS_Store
+node_modules