This seems like something that should not be lifted until North Korea fully agrees to denuclearize and act like a responsible member of the world community:
The U.S. on Thursday extended the ban on Americans’ travel to North Korea for another year, saying it was too dangerous to go there.
“The safety and security of U.S. citizens overseas is one of our highest priorities,” a State Department official said. “The travel warning for North Korea remains in place — the Department of State strongly warns U.S. citizens not to travel to North Korea.”
The travel ban extension, in force until August 31 next year, comes as Washington’s efforts to negotiate the denuclearization of the Korean peninsula with Pyongyang have stalled [VOA]
You can read more at the link.