Music streaming service Spotify AB has asked its users to change their passwords and upgrade their software after detecting unauthorized access to its internal systems and data, according to Reuters.

Chief Technology Officer Oskar Stal wrote in a blogpost on May 27 that the company has found evidence of attackers accessing just one user's data.

The breach did not include password or payment information. 

Spotify plans on asking "certain Spotify users" users to change their sign-ons and upgrade their Google Android app just as a precaution, according to Reuters.

"As an extra safety step, we are going to guide Android app users to upgrade over the next few days. If Spotify prompts you for an upgrade, please follow the instructions," said Stal. "As always, Spotify does not recommend installing Android applications from anywhere other than Google Play, Amazon Appstore or https://m.spotify.com/. At this time there is no action recommended for iOS and Windows Phone users."

Spotify is not recommending any action for users of Apple iPhones or devices based on Microsoft's Windows.

In the last couple of months cyber-attackers have infiltrated databases and systems at Adobe, and eBay, though no financial information has been taken so far, according to the companies.

Spotify has over 40 million active users around over 50 markets. It is expected to seek an IPO soon, according to Reuters.

"We have taken steps to strengthen our security systems in general and help protect you and your data - and we will continue to do so. We will be taking further actions in the coming days to increase security for our users," Stal said in his blogpost.

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