diff --git a/cookbook/hello-world/server.go b/cookbook/hello-world/server.go
index 06e0718b..320b4083 100644
--- a/cookbook/hello-world/server.go
+++ b/cookbook/hello-world/server.go
@@ -17,7 +17,7 @@ func main() {
 
 	// Route => handler
 	e.GET("/", func(c echo.Context) error {
-		return c.String(http.StatusOK, "Hello, World!\n")
+		return c.HTML(http.StatusOK, "Hello, World!\n")
 	})
 
 	// Start server