# Next.js v15.5.3 — Release & Upgrade Intelligence
- **Product:** Next.js (https://nextjs.org)
- **Version:** v15.5.3
- **Released:** Sep 11, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/nextjs/updates/v15.5.3/

## Executive Summary (TL;DR)
Next.js v15.5.3. Source highlight: This release is backporting bug fixes. It does **not** include all pending features/changes on canary.

## Bug Fixes
- fix: validation return types of pages API routes (#83069)
- fix: relative paths in dev in validator.ts (#83073)
- fix: remove satisfies keyword from type validation to preserve old TS compatibility (#83071)

## Upgrade Command
```bash
npm install --save-exact next@15.5.3
```