Armenian Prime Minister Nikol Pashinyan has briefed Russian President Vladimir Putin on a finalised draft peace agreement wirh Azerbaijan in a phone call, the Armenian government said on Friday.

But hurdles remain. Azerbaijan also said Armenia’s constitution must “eliminate the claims against the sovereignty and territorial integrity of Azerbaijan,” as a prerequisite to allow for the signing of the peace treaty.

Armenia and The Azerbaijan Republic have reached an agreement on a peace treaty, marking a significant step toward ending nearly four decades of conflict between the two former Soviet republics, officials from both countries announced on Thursday.