South Korea and the U.S. plan to resume negotiations on the revision of their expiring bilateral nuclear pact this month.

The two sides want to find common ground and reach an agreement in the talks, since the issue has been dragging on for two years. However, a bumpy road lies before them.

Washington is believed to have proposed to extend the current pact for about three years, saying it is difficult to accept Seoul’s demand for the right to reprocess spent nuclear fuel.

Saenuri Party Representative Chung Mong-joon said talks on revising the nuclear pact will be smoothly concluded only when both South Korea and the U.S. approach the issue with sincerity. He made the remarks after meeting with former U.S. Secretary of State Henry Kissinger and a former White House official.

The U.S. has expressed concerns for the two countries’ conflict over the nuclear pact, since South Korea and the U.S. now need to further strengthen their cooperation in addressing North Korea’s nuclear ambition and provocations.