---
title: Swift-SDK - 3.9.0
slug: feature-experimentation/release-notes/swift-sdk-3-9-0
docTags: 
createdAt: 2026-08-06T15:30:20.908Z
---

## 3.9.0

September 15, 2021

### New Features

Add new public properties to `OptimizelyConfig`. ([#417](https://github.com/optimizely/swift-sdk/pull/417), [#418](https://github.com/optimizely/swift-sdk/pull/418))

- sdkKey
- environmentKey
- attributes
- audiences
- events
- experimentRules and deliveryRules to `OptimizelyFeature`
- audiences to `OptimizelyExperiment`

For details, refer to our documentation page: [OptimizelyConfig for the Swift SDK](docId\:MIsKtFCm7XKiFkqzfe0BB).

### Deprecated

`OptimizelyFeature.experimentsMap` of `OptimizelyConfig` is deprecated as of this release. Please use `OptimizelyFeature.experimentRules` and `OptimizelyFeature.deliveryRules`. ([#418](https://github.com/optimizely/swift-sdk/pull/418))

[https://github.com/optimizely/swift-sdk/releases/tag/v3.9.0](https://github.com/optimizely/swift-sdk/releases/tag/v3.9.0)