Scheduled changes to the Slack platform

Here are scheduled changes, deprecations, and retirements planned ahead for the Slack platform.

We tweet about most of these updates from @slackapi but we also offer this wonderfully antiquated RSS feed. Slack, the service and product, has its own changelog too.


Effective February 24, 2021

Effective June 10, 2020

  • APIsBeginning June 10th, 2020, all newly created Slack apps will be unable to use the deprecated methods in channels.*, im.*, mpim.*, and groups.*. Existing apps have until February 24th, 2021 to migrate to the Conversations API. Learn more.

Effective March 31, 2020

  • APIsParent messages in a thread will no longer explicitly list their replies. Instead of a large replies array containing threaded message replies, we'll provide a lighter-weight list of reply_users, plus a reply_users_count and the latest_reply message. These new fields are already available. We'll remove the replies array on October 18, 2019 March 31st, 2020. Read up on threaded messages here.

Effective March 04, 2020

  • AppsOn March 4, 2020, we'll require all apps, custom integrations, bots, and users communicating with Slack to use TLS version 1.2 or higher. There will be a 24 hour test deprecation on February 19th, 2020. Read more details on why and how to upgrade.

Effective August 30, 2019

  • APIsUsing the SCIM API's GET /Users or /Groups methods? Their count parameters will no longer accept values above 1000 beginning August 30, 2019. Learn how to prepare.

Effective August 22, 2019

Effective June 03, 2019

  • APIsWhen querying dnd.teamInfo, the users argument is required beginning June 3, 2019. Future-proof your app by explicitly listing which users you wish to see Do Not Disturb settings for.

Effective May 22, 2019

Effective October 16, 2018

  • APIsWe're postponing planned changes around scope requirements for app and bot access to email addresses. The new date is in autumn, on October 16th, 2018. If you haven't already prepared, read on.

Effective September 26, 2018

  • APIsCatch up on recent changes to presence in the RTM and Web APIs and changes to come, including the deprecation of users.list's presence parameter. Read on.

Effective August 31, 2018