---
title: Swift-SDK - 5.4.1
slug: feature-experimentation/release-notes/swift-sdk-5-4-1
docTags: 
createdAt: 2026-07-20T15:44:38.502Z
---

## 5.4.1

June 24, 2026

### Fixes

- normalize campaign\_id, variation\_id, and entity\_id on decision events (#642)

[https://github.com/optimizely/swift-sdk/releases/tag/v5.4.1](https://github.com/optimizely/swift-sdk/releases/tag/v5.4.1)