diff --git a/docs/src/Preview.vue b/docs/src/Preview.vue
index 36872fb4..349a291f 100644
--- a/docs/src/Preview.vue
+++ b/docs/src/Preview.vue
@@ -14,14 +14,15 @@
 const PREFIX = 'https://img.yzcdn.cn/vant-weapp/';
 const MAP = {
   index: 'index-201808121630.png',
-  'action-sheet': 'actionsheet-201808092138.jpeg',
+  'action-sheet': 'action-sheet-201809071648.png',
   badge: 'badge-201808092138.png',
   button: 'button-201808092138.png',
   card: 'card-201808092138.png',
-  field: 'field-201808092138.png',
-  cell: 'cell-201808092138.png',
-  icon: 'icon-201808092138.png',
   col: 'layout-201808092138.png',
+  cell: 'cell-201808092138.png',
+  dialog: 'dialog-201809071648.png',
+  field: 'field-201808092138.png',
+  icon: 'icon-201808092138.png',
   loading: 'loading-201808092138.png',
   'nav-bar': 'nav-bar-201808110751.png',
   'notice-bar': 'notice-bar-201808092138.png',