diff --git a/src/components/picker-view/demos/demo1.tsx b/src/components/picker-view/demos/demo1.tsx
index bf29028c9d..a29740c672 100644
--- a/src/components/picker-view/demos/demo1.tsx
+++ b/src/components/picker-view/demos/demo1.tsx
@@ -1,10 +1,11 @@
 import React, { useState } from 'react'
 import { PickerView } from 'antd-mobile'
+import type { PickerValue } from 'antd-mobile/es/components/picker-view'
 import { DemoBlock } from 'demos'
 import { basicColumns } from './columns-data'
 
 export default () => {
-  const [value, setValue] = useState<(string | null)[]>(['Mon', 'am'])
+  const [value, setValue] = useState<PickerValue[]>(['Mon', 'am'])
 
   return (
     <>