diff --git a/reactiveweb/src/ember-concurrency.ts b/reactiveweb/src/ember-concurrency.ts
index 2632a56..767e679 100644
--- a/reactiveweb/src/ember-concurrency.ts
+++ b/reactiveweb/src/ember-concurrency.ts
@@ -54,12 +54,12 @@ export function task<
 >(context: object, task: LocalTask, thunk?: () => Args) {
   assert(`Task does not have a perform method. Is it actually a task?`, 'perform' in task);
 
-  const state = new State(task);
+  const state = new State<Args, Return, LocalTask>(task);
 
   let destroyable = resource(context, () => {
     let args = thunk || DEFAULT_THUNK;
 
-    let positional = normalizeThunk(args).positional;
+    let positional = normalizeThunk(args).positional as Args;
 
     state[RUN](positional || []);
 
@@ -171,7 +171,7 @@ export class State<Args extends any[], Return, LocalTask extends TaskIsh<Args, R
       // getOwnPropertyDescriptor(target, key): PropertyDescriptor | undefined {
       //   return Reflect.getOwnPropertyDescriptor(target.value, key);
       // },
-    }) as never as Instance;
+    });
   }
   // Set during setup/update
   declare currentTask: TaskInstance<Return>;