The NRL mandates Hudson Young's contract match his $1.1 million value, with Canberra offering an extended deal until 2031.
The NRL has told the PNG Chiefs that any contract for Hudson Young must be registered at his $1.1 million market value, matching Canberra's annual offer.
The Raiders have now increased their bid to retain the back-rower, adding a year to their initial lucrative proposal.
If Young accepts, he will remain in the nation's capital until the end of 2031.
Young is on holiday and is due to meet Canberra officials next week to discuss the improved offer.