# Bun bun-v0.5.7 — Release & Upgrade Intelligence
- **Product:** Bun (https://bun.sh)
- **Version:** bun-v0.5.7
- **Released:** Feb 24, 2023
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/bun/updates/bun-v0.5.7/

## Executive Summary (TL;DR)
Bun bun-v0.5.7. Source highlight: **Read Bun v0.5.7's release notes on Bun's blog**

## New Features
- [WIP] feat(napi): add `napi-fatal-exception`
- feat(napi): add `napi_get_value_bigint_words`
- Add dynamic port assigning to Bun.serve
- feat(fetch) AbortSignal
- allow `bun add` of packages with capital letters
- feat(node/os): implement `os.machine()`

## Improvements
- [install] improve `package.json` validation

## Bug Fixes
- [streams] fix byte accounting
- [install] fix flaky tests
- fix assertion failure
- [install] fix duplicate check on `peerDependencies`
- fix(string_immutable): fix `toUTF16Alloc` for bindgen
- Fix PATH setup in macOS setup instructions