@types/ws error with node.d.ts < version 10

I'm running node version 6.12 and need to use ws. The latest library isn't compatible with any node definition files older than version 10, even though ws supports everything from 4.5 up.

Related issue (not identical and is closed): https://github.com/DefinitelyTyped/DefinitelyTyped/issues/25890