Expensify integration to Netsuite and updating it to use HMAC-SHA256 signature method

Netsuite informed that TBA integrations using using the HMAC-SHA1  will no longer be accepted as a signature method for TBA integrations in Netsuite's next version 2023.1. Our Expensify integration is still using that. How can that be updated so that the integration will work in the beginning of 2023 too?