README.md

@@ -1079,7 +1079,7 @@ This is a catch-all category for things that don't fit anywhere else.
 [289]: https://creativecommons.org/publicdomain/zero/1.0/
 [290]: https://github.com/grumdrig/jsfxr
 [291]: https://github.com/google/material-design-icons
-[292]: http://castle-engine.sourceforge.net/
+[292]: https://castle-engine.io/
 [293]: https://github.com/gamekit-developers/gamekit
 [294]: http://incompetech.com/music/royalty-free/
 [295]: http://www.openmusicarchive.org/