diff --git a/examples/mir-example/README.md b/examples/mir-example/README.md
index 82c46ea..deb7e04 100644
--- a/examples/mir-example/README.md
+++ b/examples/mir-example/README.md
@@ -1,4 +1,4 @@
-## mir-examples
+## mir-example
 just a simple mir's examples for explain how to use mir in your project.
 
 #### Usage
diff --git a/examples/sail-example/README.md b/examples/sail-example/README.md
index 094dd5b..188ad44 100644
--- a/examples/sail-example/README.md
+++ b/examples/sail-example/README.md
@@ -1,4 +1,4 @@
-## mir-examples
+## sail-example
 just a simple mir's examples for explain how to use mir in your project.
 
 #### Usage
diff --git a/examples/sail-example/go.mod b/examples/sail-example/go.mod
index 79913a1..1bbf0a4 100644
--- a/examples/sail-example/go.mod
+++ b/examples/sail-example/go.mod
@@ -4,6 +4,7 @@ go 1.21
 
 require (
 	github.com/alimy/mir/v4 v4.2.0
+	github.com/alimy/tryst v0.12.0
 	github.com/fatih/color v1.17.0
 	github.com/gin-gonic/gin v1.10.0
 	github.com/sourcegraph/conc v0.3.0
@@ -11,7 +12,6 @@ require (
 )
 
 require (
-	github.com/alimy/tryst v0.12.0
 	github.com/bytedance/sonic v1.11.7 // indirect
 	github.com/bytedance/sonic/loader v0.1.1 // indirect
 	github.com/cloudwego/base64x v0.1.4 // indirect
diff --git a/service/help.go b/service/help.go
index 89405e0..ec92536 100644
--- a/service/help.go
+++ b/service/help.go
@@ -1,3 +1,7 @@
+// Copyright 2024 Michael Li <alimy@gility.net>. All rights reserved.
+// Use of this source code is governed by Apache License 2.0 that
+// can be found in the LICENSE file.
+
 package service
 
 import (