If you haven’t already upgraded to the latest versions of Skype’s desktop apps, you might want to soon. The Microsoft-owned VoIP service has announced that it’s going to “retire” older versions of Skype for Windows (6.13 and under ) and Mac (6.14 and under) in the coming months.

The software giant has introduced a number of significant updates to Skype this year, including cross-platform message-syncing, and free group video calls, so it’s worthwhile upgrading anyway.

While it’s not clear exactly what ‘retiring’ means, in terms of whether it will simply stop working or will just no longer be supported, Microsoft says it’s encouraging “all users to update to the latest version today to continue using Skype without disruption.”

Making Way for the Next Generation of Skype on Desktop