Websites have been working through the weekend to fix a security flaw that left users vulnerable to hackers.
It's called the "Heartbleed Bug," and it allows hackers to steal your user names and passwords.
Major websites like Facebook and Google say they fixed the problem.
It's not clear how much information, if any, has been compromised.
The problem was many websites used a security program called OpenSSL, which keeps your personal information safe online.
Even though it was just detected a week ago, researchers say the security program has been vulnerable for almost two years because of the hole in the software.
It's up to each website to update their security.
The experts say to change your passwords to online sites.
Before you change your password, make sure the website you are using is updated and safe. You can do that by clicking on the link below, and typing in the website.
back to you.
If your bank's website was compromised, you'll want to keep an eye on your financial statements for any suspicious activity.
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