diff --git a/index.html b/index.html
index ffd3b3da..08edd131 100644
--- a/index.html
+++ b/index.html
@@ -324,7 +324,7 @@ <h2 id="add-website">Adding ESP Web Tools to your website</h2>
       <pre>
 &lt;script
   type="module"
-  src="https://unpkg.com/esp-web-tools/dist/web/install-button.js?module"
+  src="https://unpkg.com/esp-web-tools@9/dist/web/install-button.js?module"
 >&lt;/script></pre
       >
       <p>