Deprecation warning in middleware.ts while upgrading Next.js 15

[IlamathiIla]

Summary

I recently updated my project from Next.js 14 to Next.js 15. While running the project in development mode, I encountered the following warning:

⚠ ./src/middleware.ts
Invalid page configuration
Page config in src/middleware.ts is deprecated. Replace export const config=… with the following:
Visit https://nextjs.org/docs/app/api-reference/file-conventions/route-segment-config for more information.

The middleware in my project follows the documentation exactly.

Additional information

No response

Example

No response

[denis23x]

Hi @IlamathiIla

Try to move your middleware to ./ ?

Also please check this article https://nextjs.org/docs/messages/invalid-page-config