Armenia and Azerbaijan will not deploy third-country forces along their border after the two sides sign a peace agreement, Armenian Prime Minister Nikol Pashinyan said on Thursday.

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 Azerbaijan have finalized the text of a peace agreement, marking a breakthrough in efforts to end nearly four decades of hostilities over Nagorno-Karabakh. Both countries confirmed on Thursday that