diff --git a/example/example_test.go b/example/example_test.go
index 5457870..3c20e44 100644
--- a/example/example_test.go
+++ b/example/example_test.go
@@ -36,8 +36,7 @@ var cases = []struct {
 			"page_number": 1,
 			"result_per_page": 10
 		}`,
-		ExpectedJSONResBody: `
-{
+		ExpectedJSONResBody: `{
 	"result": [
 		{
 			"url": "query string",
@@ -72,8 +71,7 @@ var cases = []struct {
 			"result_per_page": 10
 		}`,
 		ExpectedStatusCode: 500,
-		ExpectedJSONResBody: `
-{
+		ExpectedJSONResBody: `{
 	"field": "field123",
 	"error_count": 100
 }`,
@@ -86,8 +84,10 @@ var cases = []struct {
 			"page_number": 1,
 			"result_per_page": 10]
 		}`,
-		ExpectedStatusCode:  400,
-		ExpectedJSONResBody: `{}`,
+		ExpectedStatusCode: 400,
+		ExpectedJSONResBody: `{
+
+}`,
 	},
 	{
 		Name: "test response nil should panic",
diff --git a/example/examplemain/main.go b/example/examplemain/main.go
index 2925a2b..d0c7d44 100644
--- a/example/examplemain/main.go
+++ b/example/examplemain/main.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net/http"
 
+	"github.com/rs/cors"
 	"github.com/theplant/appkit/log"
 	"github.com/theplant/appkit/server"
 	"github.com/theplant/prottp/example"
@@ -14,7 +15,13 @@ func main() {
 	mux := http.NewServeMux()
 	example.Mount(mux)
 	l := log.Default()
+
+	c := cors.New(cors.Options{
+		AllowedOrigins: []string{"*"},
+	})
+
 	defaultmws := server.Compose(
+		c.Handler,
 		server.DefaultMiddleware(l),
 	)