Walt Disney plans to transition away from its use of Slack as a companywide workplace collaboration system, after a hacking entity leaked online more than a terabyte of company data, the Wall Street Journal reported on Thursday,

The entertainment company reportedly issued a memo to staff that a migration away from Slack’s collaboration application will conclude next year. The move follows a high-profile data breach that led to the publication of 44 million Slack messages and tens of thousands of documents by a hacking group.