Do you tend to hide your true personality in order to be taken seriously at work? Well, you might need to change your approach, since according to a study conducted by the Wharton Business School at the University of Pennsylvania in the United States, being funny at work could have a lot of advantages. If you often make jokes and smile a lot during the workday, you will have better chances of rising through the ranks and getting a promotion!In reality, being able to laugh and make jokes show your superiors that you have confidence in yourself, which will make them more likely to consider you for a position with more responsibilities. Nevertheless, tread carefully - this does not apply to all companies and trades. You have to know where to draw the line so you don't overdo it and become annoying.Now you know what you have to do, best get cracking on some one-liners for the next time you meet your boss at the coffee machine.