I am using cloud run to and firebase hosting to have a custom domain to access my application.

I know Firebase doc mentions :
Firebase Hosting is subject to a 60-second request timeout. If your app requires more than 60 seconds to run, you'll receive an HTTPS status code 504 (request timeout).

But I need to increase this timeout, since my cloud run app has a function to process data and write to an excel that can take up to 3mn.