To allow for innovation and keep customer data safe and secure, Slack updates its system requirements every six months in March and September. Read on to learn about our support life cycle policy and see a list of operating system (OS), app and browser versions that have recently reached or will soon reach the end of support. If you're using any of the versions listed, upgrade to continue using Slack.

Note: In May 2025, we adjusted our deprecation cycle from March and September to May and November. 

Tip: To see which OS and browser versions we support, visit System requirements for using Slack. For information on retired Slack features, visit Slack feature retirements.

Support life cycle policy

Slack supports app versions, browsers and OS for different periods of time, taking into account development cycles and our customers' needs:

OS, app version or browser	Length of support
Slack desktop and mobile apps	12–18 months from release
Browsers	12–18 months from release
Mac, Windows† and Linux	At least three months from the time the manufacturer stops OS support
iOS	2.5–3 years from release
Android	4.5–5 years from release

†The support cycle for Windows follows Microsoft’s Enterprise life cycle schedule, excluding support for LTSC/LTSB.

Note: To keep Slack current in the rapidly evolving market, support life cycles are subject to change at the sole discretion of Slack, with or without advance notice.

Desktop support life cycle schedule

Operating systems (OS)

What to expect
If you’re using a Windows, Mac or Linux OS that has reached end of support, you’ll still be able to access Slack as long as you’re using a supported app version, but you won’t receive app updates. Slack won’t be available to download from the App Store, Microsoft Store or Snap.

Slack app versions

App version	End of support
4.40 and below	15th November 2025
4.36 and below	15th March 2025

What to expect
When a Slack desktop app version is no longer supported, you’ll receive a notification prompting you to upgrade your app version to continue using Slack. You won’t be able to access Slack until you upgrade.

Mobile support life cycle schedule

Operating systems (OS)

What to expect
If you’re using an iOS or Android version that has reached end of support, you’ll still be able to access Slack as long as you’re using a supported app version, but you won’t receive app updates. Slack won’t be available to download from the App Store or Google Play Store.

Slack app versions

What to expect
When a Slack mobile app version is no longer supported, you’ll receive a notification prompting you to upgrade your app version to continue using Slack. You won’t be able to access Slack until you upgrade.

Browser support life cycle schedule

Browser version	End of support
Chrome 129 and below	15th November 2025
Firefox 130 and below	15th November 2025
Edge 128 and below	15th November 2025
Safari 17 and below	15th March 2025
Chrome 122 and below	15th March 2025
Edge 122 and below	15th March 2025
Firefox 123 and below	15th March 2025

What to expect
When a web browser is no longer supported you’ll be blocked from using Slack in the browser, signing in, creating new workspaces and managing settings for your workspace or Enterprise Grid organisation. You can continue these activities by upgrading to a supported browser.