Key Broke In Lock Box - What Do I Do?

So at work, we have this security box that we put all the money in. Well, my boss - being the idiot that she is - somehow broke the key off in the box. My project is to find out how to fix this issue. I've looked on-line for the company, and found myself nowhere. Should I tell my boss she needs to contact a locksmith? I really don't know what to do.. hahaha.. Suggestions?