Can't check for system update on version 2.224

When I try to check for update on my Raspberry Pi3 with Volumio version 2.224 nothing happens. Before this version a notice would come up if a update was there or not. But not now. Is there a way to update because a saw 2.246 is out now?

EDIT: Never mind, I was able to fix this by myself. Just did a apt-get update then apt-get upgrade and finally the update from GUI worked so now I have version 2.246 :smiley:

Running apt update worked for me as well. Thanks for the tip!