Apple recently announced an APNS Security Update, requiring updated server certificates for push notifications starting March 29, 2025. Courier customers are unaffected by this update and can continue to send push notifications using P8 keys or P12 certificates without any immediate changes needed. The update aims to ensure the highest level of security and compatibility with industry standards. For users relying on APNS, it's recommended to test their setup in the APNS sandbox environment soon to confirm proper configuration. For those not using Courier, they should ensure their server is using updated root certificates and consider implementing features like Smart Notification Scheduling with Delivery Windows for seamless notification delivery.