2026-01-21 – version 5.4.0
* Add – USPS First-Class Mail Rates support to REST API.
* Add – “Display Delivery Times” setting to toggle estimated delivery times on shipping rates.
* Fix – Compatibility issues with Product decimal quantities.
2026-01-20 – version 5.3.1
* Add – USPS API migration notices to inform merchants about upcoming API changes and ensure smooth transition.
2026-01-06 – version 5.3.0