CHEYENNE, Wyo. (AP) — The two health insurance companies offering coverage under the federal Affordable Care Act in Wyoming say the Internet site people must use to enroll is working better and they're seeing a sharp increase in people registering.

WINHealth and Blue Cross Blue Shield of Wyoming are the only two insurance companies offering coverage in Wyoming through the new federal health care exchange. The Internet exchange had problems after it opened in October.

Federal figures released this week show that over 520 people in Wyoming have selected an insurance plan with one the two companies as of the end of November.

Wyoming residents must select a plan by Dec. 23 for coverage to start Jan. 1. They will have to buy a plan before March 31 to avoid a tax penalty.