On January 16, 2012, Zappos announced that its computer systems were hacked, compromising the personal information of 24 million customers. In response, the company required all of its customers to change their passwords on the site, though it noted that it was highly unlikely that password information was obtained due to encryption.[24] This incident led to a class action suit In re Zappos.com, Inc., Customer Data Security Breach Litigation, with plaintiffs claiming that Zappos did not adequately protect their personal information.[25] After the case was initially dismissed, plaintiffs appeal was upheld by the Ninth Circuit Court of Appeals.[26] Zappos appealed the decision to the Supreme Court, but this was ultimately rejected.[27] As of July 2019 litigation continues.