The Brazil striker has been linked with a summer move away.
But he told ESPN: "We have developed, we have developed a lot.
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"I think the coach (Ange Postecoglou) has already said that there will be changes, so I think we will have a much more competitive team next season."
At the same time, Richarlison - who scored twelve goals and four assists in 31 games this season - admits that it has been tough for Spurs lately.
"The last four games have not been easy for us," he continued.
"We come from four losses. It's hard, but there's nothing we can do about it now. It is clear that we want to play in the Champions League next season. There is still a chance, but it is tough."