diff --git a/docs/plugin/duration.md b/docs/plugin/duration.md
index 9d7992a91..23a038821 100644
--- a/docs/plugin/duration.md
+++ b/docs/plugin/duration.md
@@ -5,7 +5,7 @@ title: Duration
 Duration adds `.duration` `.isDuration` APIs to support duration.
 
 ```javascript
-var duration = require('dayjs/plugin/duration')
+import duration from 'dayjs/plugin/duration'
 dayjs.extend(duration)
 
 dayjs.duration(100)