Stones boss George Elokobi said: “We wanted to keep Alexis at Maidstone United Football Club, but he has decided to relocate to Belgium.
“I said in interviews recently that he was the best goalkeeper in the National League South this season, and I stand by that. The stats support it too.
“He joined us last summer with big shoes to fill after the previous season. We challenged him to knuckle down and complete a full campaign – and he did just that. We thank him for his excellent contribution this season and wish him every happiness and success in the future.”