A first-half strike by Gorka Pintado sent The Swans soaring up to fourth in the Championship table after they outplayed Leicester City and secured a 1-0 victory.
"I am pleased with the spirit and character my team has shown today and I'm very proud of all my players," Sousa said after the game.
"The team is growing in maturity and we want to get even stronger as the season progresses.
"Every member of the squad works for each other and I'm very happy because we are now in a good position in the division and we want to stay there."