diff --git a/bumpver.js b/bumpver.js
new file mode 100644
index 0000000..c738464
--- /dev/null
+++ b/bumpver.js
@@ -0,0 +1,54 @@
+
+const fs = require('fs');
+const util = require('util');
+const exec = util.promisify(require('child_process').exec);
+const crypto = require('crypto');
+
+const infoPath = './info.json';
+const scoopPath = './misc/excuse.json';
+
+function makeScoop(data) {
+  let scoop = JSON.parse(fs.readFileSync(scoopPath));
+  let version = data['version'];
+  scoop['version'] = version;
+  let file = fs.readFileSync('./bin/excuse.ps1');
+  let hash = crypto.createHash('sha256').update(file, 'utf8').digest('hex');
+  scoop['hash'] = hash;
+  let url = 'https://raw.githubusercontent.com/esphas/excuse/v' + version + '/bin/excuse.ps1';
+  scoop['url'] = url;
+  fs.writeFileSync(scoopPath, JSON.stringify(scoop, null, 2));
+}
+
+async function gitTag() {
+  await exec('git add ' + infoPath);
+  await exec('git add ' + scoopPath);
+  await exec('git commit -m "bump version"');
+  await exec('git tag v' + version);
+}
+
+function main(type, extra) {
+  let info = JSON.parse(fs.readFileSync(infoPath));
+  let version = info['version'];
+  let major, minor, patch;
+  [major, minor, patch] = version.split('-')[0].split('.');
+  function succ(str) {
+    return (parseInt(str) + 1).toString();
+  }
+  switch (type) {
+    case 'M': major = succ(major); break;
+    case 'm': minor = succ(minor); break;
+    case 'p': patch = succ(patch); break;
+  }
+  version = [major, minor, patch].join('.');
+  if (extra != null) {
+    version += '-' + extra;
+  }
+  let data = { version };
+  makeScoop(data);
+  fs.writeFileSync(infoPath, JSON.stringify(data, null, 2));
+  gitTag();
+}
+
+let type = process.argv[2] || 'm';
+let extra = process.argv[3];
+main(type, extra);
diff --git a/bumpver.ps1 b/bumpver.ps1
new file mode 100644
index 0000000..78e6942
--- /dev/null
+++ b/bumpver.ps1
@@ -0,0 +1,2 @@
+
+node ./bumpver.js $args
diff --git a/bumpver.sh b/bumpver.sh
new file mode 100644
index 0000000..98d1692
--- /dev/null
+++ b/bumpver.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+node ./bumpver.js $@
diff --git a/info.json b/info.json
new file mode 100644
index 0000000..6a3252e
--- /dev/null
+++ b/info.json
@@ -0,0 +1,3 @@
+{
+  "version": "0.1.0"
+}