On March 4th, 2020, Slack will end support for TLS versions 1.0 and 1.1. In advance of this, we will implement a 24-hour test deprecation on February 19th, 2020. If you don’t update your apps to use TLS 1.2, requests sent to any Slack endpoint will fail after March 4th, 2020.
To learn more about TLS, visit our Help Center. If your apps are affected by this change, learn how to update them from the API Changelog. If you have questions, please contact our Support team.
