TypeScript mismatch between Node.js and Express after upgrading to v5

[binarykitchen]

Hello everyone,

Just migrated my app to ExpressjS v5:

-    "express": "4.21.2",
+    "express": "5.0.1",
...
-    "@types/express": "4.17.21",
+    "@types/express": "5.0.0",

All works very well like before but one TypeScript error comes up:

"Promise returned in function argument where a void return was expected."

At line:

const server = https.createServer(sslOptions, app);

I can't figure what the problem is. Variable app is of type Express, coming from express-serve-static-core:

export interface Express extends Application {
    request: Request;
    response: Response;
}

But Node.js's createServer function, taken from @types/node v22.13.5, expects it to be of type:

function createServer<
    Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
    Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
>(
    options: ServerOptions<Request, Response>,
    requestListener?: http.RequestListener<Request, Response>,
): Server<Request, Response>;

Not sure if both are compatible? Or whether it's a new bug? Thanks for any inputs :)

[binarykitchen]

Researched further, and it seems to have been raised last November, but not solved yet, see:
DefinitelyTyped/DefinitelyTyped#70563 (comment)