---
description: Workers Builds now installs the npm version set in the packageManager field of your package.json, so your builds can use the same npm version as your local machine.
title: Pin your npm version in Workers Builds with packageManager
image: https://developers.cloudflare.com/changelog/post/2026-10-23-workers-builds-pin-npm-version/og.png?v=43fe03b597df4474
---

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October 23, 2026

## Pin your npm version in Workers Builds with packageManager

[Workers](https://developers.cloudflare.com/workers/)

Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/changelog/post/2026-10-23-workers-builds-pin-npm-version/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/)

You can now choose the npm version that [Workers Builds](https://developers.cloudflare.com/workers/ci-cd/builds/) uses by setting the `packageManager` field in your `package.json`. Before the build installs dependencies, it installs the npm version you set, so a lockfile written by a newer npm version installs the same way in your build as it does locally.

*package.jsonjson*

```json
{
	"packageManager": "npm@11.19.1"
}
```

The `packageManager` field also sets the version of Yarn, pnpm, and Bun. Use an exact version, such as `npm@11.19.1`, not a range. Workers Builds does not use the `engines.npm` field to choose an npm version.

For more information, refer to [Package manager versions](https://developers.cloudflare.com/workers/ci-cd/builds/build-image/#package-manager-versions).

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