diff --git a/rx.js/rx.async.d.ts b/rx.js/rx.async.d.ts
index 522b87c0d..9a03bb33b 100644
--- a/rx.js/rx.async.d.ts
+++ b/rx.js/rx.async.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for RxJS-Async v2.2.18
+// Type definitions for RxJS-Async v2.2.20
 // Project: http://rx.codeplex.com/
 // Definitions by: zoetrope <https://github.com/zoetrope>
 // Definitions by: Igor Oleinikov <https://github.com/Igorbek>