If you thought getting computer viruses from listening to music ended with the days of KaZaA and LimeWire, we’ve got some unfortunate news for you. Turns out, Spotify has been serving malware to users who’ve installed the free version of their platform.

Basically, the free version of Spotify makes its money from ads. Not just the recorded ads you hear between songs when you use the service, but animated banner ads that show up in the sidebars and elsewhere in the program.

As the UK Telegraph reports, these ads have been directing users to websites infected with viruses. Users would even see their browsers continually open to malware-infected websites whenever they tried to use Spotify.

According to Spotify, the issue was linked to a single advert served by the program, which Spotify brass insist has since been removed. According to the Telegraph, the issue affected users of Mac, Windows, and Linux systems.

“We’ve identified an issue where a small number of users were experiencing a problem with questionable website pop-ups in their default browsers as a result of an isolated issue with an ad on our Free tier.”

“We have now identified the source of the problem and have shut it down,” a Spotify statement said. Spotify experienced a similar issue back in 2011 with a virus that made users believe it was a Windows security update.

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