diff --git a/src/async_examples/concurrency.py b/src/async_examples/concurrency.py
index 9f1ca66..1f53825 100644
--- a/src/async_examples/concurrency.py
+++ b/src/async_examples/concurrency.py
@@ -44,5 +44,5 @@ async def sorter(arr):
 
 
 async def task():
-    time.sleep(1)
-    return "done"
\ No newline at end of file
+    await asyncio.sleep(1)
+    return "done"