The new React version 0.15.2 has introduced a new warning regarding passing props to children: https://fb.me/react-unknown-prop ## Version 2.5.2 ## Test Case git clone https://github.com/FredericHeem/starhackit && cd starhackit/client && npm i && npm start ## Steps to reproduce ## Expected Behavior No react warnings ## Actual Behavior warning.js:44 Warning: Unknown props `history`, `location`, `params`, `route`, `routeParams`, `routes` on <div> tag. Remove these props from the element. For details, see https://fb.me/react-unknown-prop