Workers - Use the latest JavaScript features with Wrangler CLI v4

We've released the next major version of Wrangler , the CLI for Cloudflare Workers — [email protected] . Wrangler v4 is a major release focused on updates to underlying systems and dependencies, along with improvements to keep Wrangler commands consistent and clear. You can run the following command to install it in your projects: npm i wrangler@latest yarn add wrangler@latest pnpm add wrangler@latest bun add wrangler@latest Unlike previous major versions of Wrangler, which were foundational rewrites and rearchitectures — Version 4 of Wrangler includes a much smaller set of changes. If you use Wrangler today, your workflow is very unlikely to change. A detailed migration guide is available and if you find a bug or hit a roadblock when upgrading to Wrangler v4, open an issue on the cloudflare/workers-sdk repository on GitHub . Going forward, we'll continue supporting Wrangler v3 with bug fixes and security updates until Q1 2026, and with critical security updates until Q1 2027, at which point it will be out of support.