# Deno v2.4.3 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v2.4.3
- **Released:** Jul 31, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v2.4.3/

## Executive Summary (TL;DR)
Deno v2.4.3. Source highlight: Or install for the first time

## New Features
- feat(unstable): add useful metadata to tunnel (#30161)

## Improvements
- perf(buffer): optimize Buffer.subarray and Buffer.prototype.utf8Slice (#30213)

## Bug Fixes
- fix(bundle): don't force managed npm resolution (#30200)
- fix(check): ensure module not found errors are surfaced (#30181)
- fix(compile): do not error including npm packages that don't match current
- fix(compile): do not include managed npm deps when graph does not have any npm
- fix(ext/node): `fs.read` and `fs.write` promisify compatibility (#30152)
- fix(ext/node): add process._rawDebug (#30141)