diff --git a/README.md b/README.md
index 1739a8d..92f1d33 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,15 @@ add at the end of the `<body>`
 </body>
 ```
 
+or
+
+```
+<body>
+...
+<script src="https://unpkg.com/mailgo@latest/dist/mailgo.min.js"></script>
+</body>
+```
+
 or download the script <a download href="https://cdn.jsdelivr.net/npm/mailgo@latest/dist/mailgo.min.js">here</a> and
 
 ```
@@ -33,6 +42,15 @@ or download the script <a download href="https://cdn.jsdelivr.net/npm/mailgo@lat
 </body>
 ```
 
+you can also import mailgo in `<head>` using `defer`
+
+```
+<head>
+...
+<script src="https://cdn.jsdelivr.net/npm/mailgo@latest/dist/mailgo.min.js" defer></script>
+</head>
+```
+
 ---
 
 ## usage
