diff --git a/packages/hydrooj/src/plugin-api.ts b/packages/hydrooj/src/plugin-api.ts
index 04fb0e604..3cc4ea6a6 100644
--- a/packages/hydrooj/src/plugin-api.ts
+++ b/packages/hydrooj/src/plugin-api.ts
@@ -2,6 +2,7 @@ import pwsh from './lib/hash.hydro';
 import db from './service/db';
 
 export { nanoid } from 'nanoid';
+export { default as moment, isMoment } from 'moment-timezone';
 
 export {
     WebService, Router, HandlerCommon, httpServer,