There’s a worm spreading among jailbroken iPhones in Australia that makes one hilarious modification. The virus changes the iPhone wallpaper to a picture of Rick Astley. Luckily for those who have picked up the bug, there is no malicious code involved. It’s just a stunt by a 21-year old who hopes to get a few laughs and get people to get a little more serious about phone security.

“The virus itself is not malicious and is not out to hurt people. It’s just poking fun and hoping waking people up a little,” said the creator, who lives in Sydney. For those of you who are unaware, jailbroken phones can be accessed using the password “alpine” for SSH control. If you don’t change the password upon jailbreaking, anyone with a little tech savvy can add or remove files to/from your iPhone.

Luckily for you, the fix is really simple. Just load up Cydia and get the MobileTerminal app, and then use the “passwd” command to make the necessary change. And do it now. Rick Astley may seem harmless, but he’s just a gateway drug to much more serious problems.