Boeing and Enter Air have announced the Polish airline is expanding its commitment to the 737 family with a new order for two 737-8 planes plus options for two more jets.

An all-Boeing operator and Poland’s biggest charter carrier, Enter Air began operations in 2010 with a single 737 aeroplane. Today, the airline’s fleet includes 22 Next-Generation 737s and two 737 MAX aircraft.

When the new purchase agreement is fully exercised, Enter Air’s 737 MAX fleet will rise to 10 aircraft.

Enter Air and Boeing have also finalized a settlement to address the commercial impacts stemming from the grounding of the 737 MAX fleet.