---
title: Javascript-SDK - 1.3.5
slug: feature-experimentation/release-notes/javascript-sdk-1-3-5
docTags: 
createdAt: 2026-07-20T15:44:17.261Z
---

\* Bump optimizely-server-sdk to version 1.2.3, which includes:
\- Switched to json-schema library which has a smaller footprint.
\- Refactored order of bucketing logic.
\- Refactor lodash dependencies.
\- Fixed error on validation for objects with undefined values for attributes.

[https://github.com/optimizely/javascript-sdk/releases/tag/1.3.5](https://github.com/optimizely/javascript-sdk/releases/tag/1.3.5)