Citizens of foreign countries who have traveled to North Korea on or after March 1, 2011 will no longer be eligible for the U.S. Visa Waiver Program (VWP) under new rules made public this week.

In a change first reported by South Korea’s Yonhap News on Tuesday, citizens of the 38 countries previously eligible for 90-day visa-free entry into to the U.S. will now need to obtain a visa if they have visited the DPRK in the last eight years.

“No longer eligible to travel or be admitted to the United States under the Visa Waiver Program… [are] nationals of VWP