diff --git a/README.md b/README.md
index 0b39d30..833b29c 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,10 @@ yarn add @sveltejs/svelte-scroller
 ```html
 <script>
   import Scroller from '@sveltejs/svelte-scroller';
+
+  let index;
+  let offset;
+  let progress;
 </script>
 
 <style>