---
title: Javascript-SDK - 4.9.1
slug: feature-experimentation/release-notes/javascript-sdk-4-9-1
docTags: 
createdAt: 2026-07-20T15:45:46.559Z
---

## \[4.9.1]

January 18, 2022

### Bug fixes

\- Fixed typescript compilation issue introduced by \`4.9.0\` (\[#733]\([https://github.com/optimizely/javascript-sdk/pull/733](https://github.com/optimizely/javascript-sdk/pull/733)))

[https://github.com/optimizely/javascript-sdk/releases/tag/v4.9.1](https://github.com/optimizely/javascript-sdk/releases/tag/v4.9.1)