Boeing Co. has accelerated 737 Max deliveries to Ryanair Holdings Plc, the Irish airline’s chief executive officer said, and has expressed confidence that it will be able to raise production rates on its top-selling jetliner by the end of October.

Boeing ( NYSE: BA) has sped up deliveries of 737 Max aircraft to Ryanair ( RYAAY) and is preparing to boost monthly production later this fall, Reuters reported Wednesday, citing the Irish carrier’s chief executive.

Ryanair expects that Boeing will boost its monthly output of 737 jets to 42 per month from 38 by October, the airline's chief executive Michael O'Leary told journalists on Wednesday.