diff --git a/docs/plugin/duration.md b/docs/plugin/duration.md
index 9d7992a91..028626051 100644
--- a/docs/plugin/duration.md
+++ b/docs/plugin/duration.md
@@ -10,3 +10,10 @@ dayjs.extend(duration)
 
 dayjs.duration(100)
 ```
+
+In addition, you can now add `Duration` values to `dayjs` instances:
+```javascript
+const d = dayjs('2020-10-01');
+const days = dayjs.duration(2, 'days');
+d.add(days).format('YYYY-MM-DD')); // 2020-10-03
+```