With the release of Node.js 10, features like BigInt, a stable API for native addons, and several performance improvements are now available in production. To enable support for Node.js 10 in new serverless functions and Next.js applications on Vercel, simply add an engines field to your package.json file with `node: 10.x`. This allows you to take advantage of security updates and features released to Node.js 10 LTS without pinning a specific version. The most noticeable improvement is the performance boost in serverless functions, thanks to V8 6.6, which makes tasks like Array.reduce faster even for regular Promises. To upgrade your existing deployments, follow the instructions on how to do so and keep an eye out for future Node.js updates via Twitter.