diff --git a/README.md b/README.md
index 33bf516..6fb2542 100644
--- a/README.md
+++ b/README.md
@@ -15,10 +15,13 @@ Wrap your function.
 const task = backgroundTask(() => {
 	// do stuff
 });
+
+task().then(result => {
+	// task has finished.
+});
 ```
 
-Call `task` as you would any other function that has no return value. The return value of a
-background task is true if the task was queued to `requestIdleCallback` immediately or `false` if there are previous invocations queued ahead of it.
+Call `task` as you would any other async function. The return value is a promise for when the background task completes.
 
 Calling a task multiple times will queue the passed parameters and execute the task sequentially the same number of times.