diff --git a/packages/ui-default/components/calendar/index.js b/packages/ui-default/components/calendar/index.js
index 899d0da93..00f001da6 100644
--- a/packages/ui-default/components/calendar/index.js
+++ b/packages/ui-default/components/calendar/index.js
@@ -1,5 +1,5 @@
 import _ from 'lodash';
-import moment from 'dayjs';
+import moment from 'moment';
 import tpl from 'vj/utils/tpl';
 
 export default class Calendar {
@@ -165,7 +165,6 @@ export default class Calendar {
   }
 
   buildBodyData() {
-    const now = moment();
     const days = [];
     {
       // back fill
@@ -206,6 +205,7 @@ export default class Calendar {
       }
     }
 
+    const now = moment();
     days.forEach((day) => {
       day.current = day.date.isSame(now, 'day'); // eslint-disable-line no-param-reassign
     });
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index fd1ecf233..6324e8c9a 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.11.14",
+  "version": "4.11.15",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
@@ -66,6 +66,7 @@
     "jquery.easing": "^1.4.1",
     "jquery.transit": "^0.9.12",
     "mini-css-extract-plugin": "^1.6.0",
+    "moment": "^2.29.1",
     "monaco-editor": "^0.24.0",
     "monaco-editor-webpack-plugin": "^3.1.0",
     "nanoid": "^3.1.23",