Make session time to 48h

Session time problem.
For example.
I come to the office at 11am. Then work in Bitbucket till 2pm.
Next day I come to the office in 12pm then get meeting and open Bitbucket just at 3pm.
What I see? I've been logged out.
As a user I use it every day, but for the system I try to use session in 25 hours from the last touch.
I propose you to change this very user unfriendly behavior make session time longer up to 48 hours.