---
title: React-SDK - 2.1.0
slug: feature-experimentation/release-notes/react-sdk-2-1-0
docTags: 
createdAt: 2026-07-20T15:45:21.114Z
---

\## \[2.1.0] - July 8th, 2020
Upgrade \`@optimizely/optimizely-sdk\` to 4.1.0. See \[@optimizely/optimizely-sdk Release 4.1.0]\([https://github.com/optimizely/javascript-sdk/releases/tag/v4.1.0](https://github.com/optimizely/javascript-sdk/releases/tag/v4.1.0)) for more details.

\## New Features
\- Add support for JSON feature variables (\[#53]\([https://github.com/optimizely/react-sdk/pull/53](https://github.com/optimizely/react-sdk/pull/53)))

[https://github.com/optimizely/react-sdk/releases/tag/2.1.0](https://github.com/optimizely/react-sdk/releases/tag/2.1.0)