The Gunners chief insisted his first priority come the summer will be to tie down both to long-term deals.
Wenger said: "With Theo and Van Persie, that will be sorted out at the end of the season.
"Theo is playing very well. He has improved his technical level a lot, his links with other players and his calmness in front of goal. He is developing very well.
"It is something I will look to sort out very early.
"Yes, I am confident they will sign. To say that I am always confident, yes I am. We want to keep our best players."