diff --git a/README.md b/README.md
index a3f65c4..1dc1a2a 100644
--- a/README.md
+++ b/README.md
@@ -215,6 +215,8 @@ await task; // NG, throws Exception
 
 Store to the class field, you can use `UniTask.Lazy` that gurantee call multipletimes. `.Preserve()` allows for multiple calls (internally cached results). This is useful when multiple calls in a function scope.
 
+Also `UniTaskCompletionSource` can await multipletimes and await from many caller.
+
 Cancellation and Exception handling
 ---
 Some UniTask factory methods have `CancellationToken cancellationToken = default` parameter. Andalso some async operation for unity have `WithCancellation(CancellationToken)` and `ToUniTask(..., CancellationToken cancellation = default)` extension methods.