Twitter, microblogging website has urged its more than 330 million users to change their passwords after a glitch caused some to be stored in readable text rather than in encrypt format on its internal computer system.

According to Reuters, the social network disclosed the issue in a blog post and series of Tweets on Thursday afternoon, saying it had resolved the problem.

It stated that an internal investigation had found no indication passwords were stolen or misused by insiders.But still, it urged all users to consider changing their passwords.

“We fixed the bug and have no indication of a breach or misuse by anyone. As a precaution, consider changing your password on all services where you’ve used this password,” Jack Dorsey, Chief Executive, said in a Tweet.

The blog did not say how many passwords were affected. A person familiar with the company’s response said the number was “substantial” and that they were exposed for “several months.”

The disclosure comes as lawmakers and regulators around the world scrutinize the way that companies store and secure consumer data, after a string of security incidents at Equifax Inc, Facebook Inc and Uber Technologies Inc [UBER.UL].

The European Union is due later this month to start enforcing a strict new privacy law, the General Data Protection Regulation, that includes steep fees for violators.