error TS7016: Could not find a declaration file for module 'threads'

I am not sure how to configure my node app to support TypeScript when using this package. The compiler complain:
> error TS7016: Could not find a declaration file for module 'threads'. 'node_modules/threads/index.mjs' implicitly has an 'any' type.
Try `npm i --save-dev @types/threads` if it exists or add a new declaration (.d.ts) file containing `declare module 'threads';`,

I have tried both of those things, neither work. I am using `npx nodemon src/index.ts` to run my app and the `threads.d.ts` file is in the same folder as its usage.

What can I do?