Euphorbia tirucalli: how to help it?

Hi everyone.
The plant in the photo is my Euphorbia tirucalli, which was given to me almost a year ago. After a very difficult first few months in my office, where it was really suffering from the lack of light, I brought it back home, where it has improved slightly.
The problem is that, as you can see, the upper part is very droopy, and this bothers me more than it bothers the plant. Do you have any advice on what I can do to “straighten it up”? Should I just cut off the droopiest branch and that’s it?
Thanks a lot!