Can't connect to DB inside Next.js middleware

[Bilboramix]

Hello there, i'm trying to connect to my DB inside a Next.js middleware. Everything is working fine inside server components and api route handlers, it's only occuring when i'm trying to use it inside middleware.

I use this code for connection : https://github.com/vercel/next.js/blob/canary/examples/with-mongodb-mongoose/lib/dbConnect.js
And this one in the middleware :

export async function middleware(request: NextRequest) {
  await dbConnect();
}

Then when i'm triggering it i get this error :

- error src\db\connectToDb.js (62:60) @ connect
- error Cannot read properties of undefined (reading 'connect')
  60 |                     };
  61 |                     _a = cached;
> 62 |                     return [4 /*yield*/, mongoose_1.default.connect(DATABASE_URL, opts).then(function (mongoose) {
     |                                                            ^
  63 |                             return mongoose;
  64 |                         })];
  65 |                 case 1: