On September 25, when Hitler was still going to proceed to Lithuania, the Soviet Union proposed to renegotiate the spheres of interest. On September 28, 1939 in Moscow Molotov and Ribbentrop signed the German-Soviet Boundary and Friendship Treaty, determining the boundary of their respective national interests in the territory of the former Polish state.[119] In a secret supplementary protocol to the treaty the spheres of interest outside Poland were renegotiated, and in exchange for some already captured portions of the Polish territory Germany acknowledged still independent Lithuania part of the Soviet zone.[120]