I’m happy to announce Fulcro 2.6.0 is on Clojars. https://github.com/fulcrologic/fulcro This new release includes a complete rework of the internals to work with React 16's new lifecycle methods, and should be forward compatible to React 17 when it ships. It also includes a number of improvements, and maintains backward compatibility with React 15 (though 16 is now the default).