diff --git a/examples/hello-world/index.html b/examples/hello-world/index.html
index 1c6176d..a25720a 100644
--- a/examples/hello-world/index.html
+++ b/examples/hello-world/index.html
@@ -5,7 +5,7 @@
-
+
Scroll to Hello World section
diff --git a/src/index.js b/src/index.js
index e500e96..c887c6b 100644
--- a/src/index.js
+++ b/src/index.js
@@ -28,7 +28,7 @@ const init = ({
el.addEventListener('click', e => {
e.preventDefault()
- const begin = document.body.scrollTop
+ const begin = document.documentElement.scrollTop || document.body.scrollTop
const end = begin + target.getBoundingClientRect().top
const startTime = Date.now()