Alter dashboard welcome message size

[Project MARCH]

Hi!

We have just upgraded our Confluence webpage to 6.2.0 but I want to make some small changes to the way the dashboard looks. The problem is as follows:

In a nutshell, our "All updates" do not use a lot of space, but we do have a weekly update on the right that contains a lot of text. I want to make this box of text wider.

Thanks in advance!