Cooperation between Sigismund I and Stefan continued through 1411, when the Serbian Despot, in July, stayed in Buda, accompanied by his nobles. On that occasion there was a strengthening of mutual relations, but the text of the agreement and its provisions have not been preserved. His biographer says that on that occasion Stefan did true love with West, and Jovana Kalić said that Stefan since then often went to Buda and not be returned without a new property, which he lavishly endowed the ruler of Hungary, adding that from Hungarian sources that time proclaim that the Serbian Despot with their country subverted the supremacy of the Hungarian king. Stefan received form Sigismund lands in former Hungary, which included the villages, towns and mines, which were in Szatmár County, Bihar County, Szabolcs County and Torontál County. By late summer, Sigismund I made peace with the King of Bosnia Ostoja (the first government of 1398-1404, the second government from 1409 to 1418) and other nobles from Bosnia, which ended the long-term conflicts. Under his control remained Usora area, while Srebrnica, probably during that year, transferred to Despot Stefan. At the end of the year, Stefan's sister and the widow of Đurađ II Kotromanić Balšić, Jelena remarried to Sandalj Hranić Kosača after his peace with Sigismund I. In May next year, Stefan was with a large entourage was back in Budapest. He attended the great council of the European aristocracy in which there has been a reconciliation between Sigismund I and Polish king Vladislav II (Duke of Lithuania 1377-1434, king of Poland from 1386 to 1434), and next to him at the council appeared nobles and the king of Bosnia, as well as a number of other Balkan rulers and nobles.