diff --git a/async/promise.go b/promise/promise.go
similarity index 97%
rename from async/promise.go
rename to promise/promise.go
index ebf5a7c..6e41369 100644
--- a/async/promise.go
+++ b/promise/promise.go
@@ -1,8 +1,8 @@
 // Copyright 2023 dudaodong@gmail.com. All rights reserved.
 // Use of this source code is governed by MIT license
 
-// Package async contain some featurese to support async programming. eg, promise, asycn/await, eventbus.
-package async
+// Package promise contains some functions to support async programming.
+package promise
 
 import (
 	"errors"
diff --git a/async/promise_example_test.go b/promise/promise_example_test.go
similarity index 99%
rename from async/promise_example_test.go
rename to promise/promise_example_test.go
index 6b06df3..0494d43 100644
--- a/async/promise_example_test.go
+++ b/promise/promise_example_test.go
@@ -1,4 +1,4 @@
-package async
+package promise
 
 import (
 	"errors"
diff --git a/async/promise_test.go b/promise/promise_test.go
similarity index 99%
rename from async/promise_test.go
rename to promise/promise_test.go
index bccb48b..0201c26 100644
--- a/async/promise_test.go
+++ b/promise/promise_test.go
@@ -1,4 +1,4 @@
-package async
+package promise
 
 import (
 	"errors"