---
title: NEXTJS_MISSING_REACT_STRICT_MODE
product: vercel
url: /docs/conformance/rules/NEXTJS_MISSING_REACT_STRICT_MODE
type: conceptual
prerequisites:
  []
related:
  []
summary: Applications using Next.js should enable React Strict Mode
install_vercel_plugin: npx plugins add vercel/vercel-plugin
---

# NEXTJS_MISSING_REACT_STRICT_MODE

> **🔒 Permissions Required**: Conformance

We strongly suggest you enable Strict Mode in your Next.js application
to better prepare your application for the future of React. See the [Next.js doc on React Strict Mode](https://nextjs.org/docs/api-reference/next.config.js/react-strict-mode)
for more information.

## How to fix

Add the following to your `next.config.js` file.

```json filename="next.config.js"
module.exports = {
  reactStrictMode: true,
}
```


---

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