diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index d13070b4b..625fbfd7b 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.21.4",
+    "version": "2.21.5",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/entry/master.ts b/packages/hydrooj/src/entry/master.ts
index 95a505662..dd03b4ea7 100644
--- a/packages/hydrooj/src/entry/master.ts
+++ b/packages/hydrooj/src/entry/master.ts
@@ -68,10 +68,10 @@ export async function load(call: Entry) {
     storage.start(sopts);
     require('../service/monitor');
     for (const i of builtinModel) require(`../model/${i}`);
-    const scripts = require('../upgrade');
+    const scripts = require('../upgrade').default;
     let dbVer = (await modelSystem.get('db.ver')) ?? 0;
     const isFresh = !dbVer;
-    const expected = scripts.default.length;
+    const expected = scripts.length;
     while (dbVer < expected) {
         logger.info('Upgrading database: from %d to %d', dbVer, expected);
         if (isFresh) {