Twilio Changelog | Dec. 16, 2025
Twilio end-user certificates for all REST API endpoints will be rotated on January 19, 2026
Security and reliability go hand in hand, and we want to make sure your applications keep running smoothly while we work in the background to keep things safe.
That’s why on January 19, 2026, the end-user certificate for all Twilio REST API endpoints will be rotated to help keep your applications secure and resilient.
Only the end-user certificate and certificate serial number will be renewed; root and intermediate certificates will remain the same. This is a routine update that won’t impact most customers unless you’re pinning certificates or are managing them manually. Customers using the Twilio Helper Libraries don’t need to take any action since the change will be handled automatically.
We highly discourage customers from pinning certificates because it creates potential security risks, can cause downtimes for services, and a higher probability of failed API requests.
How to test your connection
The new certificate will be available for testing on https://tls-test.twilio.com starting December 15, 2025. If the request succeeds with a 200 OK, no further action is required.
Need a hand?
Check out these resources for more information: