---
title: Ruby-SDK - 4.0.1
slug: feature-experimentation/release-notes/ruby-sdk-4-0-1
docTags: 
createdAt: 2026-07-20T15:44:46.723Z
---

## [#401](docId\:q6RP8FkQTdmLA8KzLUBJQ)4.0.1

March 13th, 2023

We updated our README.md and other non-functional code to reflect that this SDK supports both Optimizely Feature Experimentation and Optimizely Full Stack. ([#327](https://github.com/optimizely/ruby-sdk/pull/327))

[https://github.com/optimizely/ruby-sdk/releases/tag/v4.0.1](https://github.com/optimizely/ruby-sdk/releases/tag/v4.0.1)