---
title: Ruby-SDK - 5.2.1
slug: feature-experimentation/release-notes/ruby-sdk-5-2-1
docTags: 
createdAt: 2026-07-20T15:44:47.321Z
---

## What's Changed

[#whats-changed](docId\:og8o9fk-9Tz43TIlF6bdp)

- \[FSSDK-12094] Fix Ruby holdout implementation which related to FSC failures by @esrakartalOpt in [https://github.com/optimizely/ruby-sdk/pull/382](https://github.com/optimizely/ruby-sdk/pull/382)
- \[FSSDK-12094] chore: preparing for release v5.2.1 by @esrakartalOpt in [https://github.com/optimizely/ruby-sdk/pull/383](https://github.com/optimizely/ruby-sdk/pull/383)

**Full Changelog**: [https://github.com/optimizely/ruby-sdk/compare/v5.2.0...v5.2.1](https://github.com/optimizely/ruby-sdk/compare/v5.2.0...v5.2.1)

[https://github.com/optimizely/ruby-sdk/releases/tag/v5.2.1](https://github.com/optimizely/ruby-sdk/releases/tag/v5.2.1)