---
title: Next Upgrade
category: product
entity_type: skill
price: $15
canonical: https://forgehouse.ai/skills/next-upgrade/
lang: en
hreflang_alt: https://forgehouse.ai/tr/skiller/next-upgrade/
last_updated: 2026-06-20
---

# Next Upgrade

> Upgrade Next.js to the latest version with codemods and migration guides.

A risk-minimized playbook for upgrading Next.js across major versions (13 → 14 → 15 → 16) using an incremental, codemod-first strategy. It automates breaking-change migrations like the async Request API, manages peer-dependency compatibility, and verifies each step with type-check, build, and live preview before touching production. Turn a dreaded 'big bang' upgrade into a series of small, reversible, git-committed steps.

## Use cases
- Jumping from Next.js 14 to 15 with React 19
- Adopting Next.js 16 Cache Components and stable Turbopack
- Migrating sync params/cookies/headers to async (v15)
- Resolving peer-dependency conflicts (next-intl, next-auth, Tailwind v4)
- Clearing deprecated-API warnings from Vercel build logs
- Applying security patches via clean minor upgrades

## Benefits
- Zero-downtime production upgrades with instant rollback paths
- Hours of manual editing collapsed into single codemod commands
- Each version step isolated and verified before the next begins
- Compatibility surprises caught before deploy, not after

## What’s included
- 8-step upgrade workflow from version detection to runtime test
- Official @next/codemod commands per version (async-request-api, dynamic-access, geo/ip)
- Version-specific breaking-change checklists for v14, v15, v16
- Compatibility matrix for Next.js, React, and peer packages
- Defensive before/after code patterns for async params and cookies/headers
- 3-command rollback strategy plus a full post-upgrade verification checklist

## Who it’s for
For teams running production Next.js apps who need to move to the latest version without breaking live traffic.

## How it runs
Version jumps are walked, not leapt. A 13-to-16 upgrade runs as four separate hops, each with its own codemods, its own build check and its own commit.
1. Detects the upgrade path from package.json and refuses to jump majors in one leap: 13 to 16 runs as 13-14-15-16, each hop with its own codemods, its own build verification and its own git commit.
2. Prepares reversibility before touching code: a dedicated upgrade branch, package.json and lockfile backups, and a known 3-command rollback (checkout main, wipe node_modules and .next, reinstall).
3. Runs the official codemods first and reviews the diff: next-async-request-api converts 50+ files in one command, then a targeted grep hunts the edge cases the codemod cannot see (conditional params, wrapper functions) for manual fixes only.
4. Updates dependencies as a compatibility matrix, not one by one: next, react, react-dom, @types and eslint-config-next move together (Next 15 hard-requires React 19), and npm ls flags every peer warning as a potential runtime error.
5. Walks the manual breaking-change checklist per version: async params/cookies/headers in v15, the fetch cache default flip from force-cache to no-store, Turbopack and Cache Components in v16.
6. Gates the release: tsc with zero errors, lint, production build, then a Vercel preview deploy where homepage, a dynamic route, an API route and the middleware are exercised, with a Lighthouse regression check before main merge.

## FAQ
### We're two major versions behind. Do we jump straight to 16 or go step by step?
Step by step, that's the core of the playbook. Each major version (13 to 14 to 15 to 16) is an isolated, git-committed step verified with type-check, build, and live preview before the next begins. The version-specific breaking-change checklists exist per step, so a direct leap would skip the safety they provide.

### What do the codemods handle, and what's left for me to do by hand?
The official @next/codemod commands automate the mechanical breaking changes, async-request-api, dynamic access, geo/ip migrations, collapsing hours of edits into single commands. What stays manual is peer-dependency reconciliation (next-intl, next-auth, Tailwind v4), guided by the compatibility matrix rather than auto-fixed.

### Is zero-downtime actually guaranteed?
No, no upgrade process can promise that. The playbook minimizes risk with verification gates at every step and a 3-command rollback path so a bad step is reversible in minutes. Exotic custom code or unusual dependencies can still surprise you, which is exactly why nothing reaches production unverified.

## Price
$15, one-time, no subscription. VAT included.

Related guide: [AI code review and developer workflow](https://forgehouse.ai/guides/ai-code-review/)