diff --git a/index.d.ts b/index.d.ts
index 8b5980b..eb1a9eb 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,3 +1,3 @@
 interface NxStatic {
-  // your codes goes here.
+  promiseCompose(...fns): Promise<any>;
 }