IRRd 4.1.4 was released on June 18th, 2021, and extends the permitted format for the RPKI ROA source </admins/rpki> configured in rpki.roa_source.
IRRd now allows the ASN in this JSON file to be encoded as an integer, in addition to the existing support for encoding it as a string prefixed with AS. This newly supported integer encoding of AS numbers is used in the latest version of the JSON export of rpki-client.