Dumfries' current deal runs to the end of the season.
He said at his Holland media conference: "I hope it will be completed as soon as possible. It looks good, I hope I can sign as soon as possible.
"I played little, so I still have to renew the contract. Obviously I want to play more. I am focused on earning more minutes. Fortunately I've had a little more in the past few weeks, but (Matteo) Darmian is a tough competitor."
Dumfries then continued: "Everyone says that the number of games we have to play is too high, but I feel fit. A complete calendar is at the expense of quality and it is a pity if consequently less quality is seen on the field.
"If you have to give up your salary and want to play less then I don't care, I have no opinion about it."