---
title: PHP-SDK - 4.0.4
slug: feature-experimentation/release-notes/php-sdk-4-0-4
docTags: 
createdAt: 2026-10-18T22:00:00.000Z
---

## 4.0.4

October 15, 2026

### Dependency updates

(FSSDK-13266) – Extended the supported dependency versions to `justinrainbow/json-schema` 6.x and `lastguest/murmurhash` 2.1 and later 2.x releases. Upgrade those packages in your app without holding back the PHP SDK. Bucketing returns identical results with murmurhash 1.x and 2.x, so users keep their variations. See [Install the PHP SDK](https://docs.optimizely.com/feature-experimentation/docs/install-sdk-php).

[https://github.com/optimizely/php-sdk/releases/tag/4.0.4](https://github.com/optimizely/php-sdk/releases/tag/4.0.4)