extend main page time horizon to show 5-6 years instead of current limit of 2

Our company's planning window is 6 years (Current + 5). I tried putting in release date to 2020 and 2021. Aha takes that, but the dashboard on the main home page won't display beyond 2 years and ends on year 2017. Would it be possible to extend that display to include all 5 years I planned?