TS errors on build

[billdami]

Seeing the following errors on build:

node_modules/ember-concurrency-decorators/index.d.ts:3:29 - error TS2315: Type 'TaskProperty' is not generic.

3 declare type TaskProperty = GenericTaskProperty<unknown, unknown[]>;
                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/ember-concurrency-decorators/index.d.ts:4:34 - error TS2315: Type 'TaskGroupProperty' is not generic.

4 declare type TaskGroupProperty = GenericTaskGroupProperty<unknown>;

These are my current relevant dependencies:

"ember-source": "3.20.4",
"ember-concurrency": "1.2.1",
"ember-concurrency-decorators": "2.0.1",
"ember-concurrency-ts": "0.2.0",
"ember-cli-typescript": "3.1.4",
"typescript": "3.7.5"

If you need any more info let me know, thanks!