diff --git a/package.json b/package.json
index 1607854..b73f298 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
     "typecheck": "tsc --noEmit",
     "lint": "biome check main.ts src/",
     "lint:fix": "biome check --write main.ts src/",
+    "version": "node scripts/bump-version.mjs",
     "test": "npm run build && npm run typecheck && node scripts/run-tests.mjs",
     "test:only": "node scripts/run-tests.mjs"
   },
diff --git a/scripts/bump-version.mjs b/scripts/bump-version.mjs
new file mode 100644
index 0000000..0093eb2
--- /dev/null
+++ b/scripts/bump-version.mjs
@@ -0,0 +1,34 @@
+#!/usr/bin/env node
+/**
+ * Bump plugin version in manifest.json and versions.json atomically.
+ * Usage: node scripts/bump-version.mjs <version>
+ * Example: node scripts/bump-version.mjs 1.0.8
+ */
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const root = path.dirname(path.dirname(fileURLToPath(import.meta.url)));
+const version = process.argv[2];
+
+if (!version || !/^\d+\.\d+\.\d+$/.test(version)) {
+  console.error('Usage: node scripts/bump-version.mjs <version>');
+  console.error('Example: node scripts/bump-version.mjs 1.0.8');
+  process.exit(1);
+}
+
+const manifestPath = path.join(root, 'manifest.json');
+const versionsPath = path.join(root, 'versions.json');
+
+const manifest = JSON.parse(fs.readFileSync(manifestPath, 'utf8'));
+const versions = JSON.parse(fs.readFileSync(versionsPath, 'utf8'));
+
+const oldVersion = manifest.version;
+manifest.version = version;
+versions[version] = manifest.minAppVersion;
+
+fs.writeFileSync(manifestPath, JSON.stringify(manifest, null, '\t') + '\n');
+fs.writeFileSync(versionsPath, JSON.stringify(versions, null, '\t') + '\n');
+
+console.log(`Bumped version: ${oldVersion} → ${version}`);
+console.log(`Updated: manifest.json, versions.json`);