A last-minute sign-up surge will help keep insurance premiums stable for plans purchased on Affordable Care Act-established exchanges, reports Kaiser Health News.

Obama administration officials on Thursday predicted health insurance premiums would be stable next year despite concerns that not enough young and healthy people signed up through the online insurance exchanges.

“The risk pool is fundamentally large and varied to support that kind of pricing…in every state,” said Mike Hash, director of the office of health reform for the Health and Human Services Department. “We believe … premiums will be stable.”