Upgraded iCloud Drive storage isn't showing on MacBook Pro iCloud Drive

When we got our new iPhone 6s Plus phones, I decided to upgrade the iCloud storage from 5G to 55G (or 50G). Today I decided to experiment with saving a GarageBand Project to the iCloud. It worked as expected, but I noticed that the MacBook Pro running Yosemite only sees 5G; it doesn't know that there are 50G.

What do I need to do to fix that?

Thanks!