---
title: JavaScript SDK 4.0.1
summary: null
url: >-
  https://www.fastly.com/documentation/reference/changes/2026/10/javascript-sdk-4.0.1
---

## Fixed

- Add lockfile to weval install ([#1607](https://github.com/fastly/js-compute-runtime/issues/1607)) ([bd917a0](https://github.com/fastly/js-compute-runtime/commit/bd917a0421e4fbc5bbc7b1c86f7b20b1e34945ff))
- **deps:** bump weval to 0.5.1 ([#1604](https://github.com/fastly/js-compute-runtime/issues/1604)) ([7bb2844](https://github.com/fastly/js-compute-runtime/commit/7bb2844dfc38b50c9d5a1e2c47bcc468a88213f4))
- **dep:** Update to [weval@0.5.0](mailto:weval@0.5.0) and @bytecodealliance/[jco@1.17.9](mailto:jco@1.17.9) ([#1601](https://github.com/fastly/js-compute-runtime/issues/1601)) ([769f43b](https://github.com/fastly/js-compute-runtime/commit/769f43bcc051770c19806997e92c053e3301a97b))