# Saleor 3.20.15 — Release & Upgrade Intelligence
- **Product:** Saleor (https://saleor.io)
- **Version:** 3.20.15
- **Released:** Aug 19, 2024
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/saleor/updates/3.20.15/

## Executive Summary (TL;DR)
Saleor 3.20.15. Source highlight: Make celery worker prefetch multiplier configurable (#16557)  (90b28798f3)

## New Features
- Add more tests for call_order_event for expired orders (#16541) (b3708bfb71)

## Improvements
- Deprecate manager.perform_mutation (#16511) (6b55454e04)