Execute in background for more than 3 minutes?

Hi,

My app is a timer-app. It works fine for 3 minutes in the background. If I set it to 5 minutes, it only works (in the background) for 3 minutes, then it stops. (it continues when I open the app again).

I believe there was a 10 minute "window" before, but now it's only 3? Is it possible to use beginBackgroundTaskWithExpirationHandler or something like that to ask for more time?