diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index f055991ad..fcc328aa6 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.15.25",
+    "version": "2.15.26",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
@@ -43,7 +43,7 @@
         "@types/koa": "^2.11.4",
         "@types/koa-router": "^7.4.1",
         "@types/koa-static-cache": "^5.1.0",
-        "@types/lodash": "^4.14.167",
+        "@types/lodash": "^4.14.168",
         "@types/lru-cache": "^5.1.0",
         "@types/minio": "^7.0.7",
         "@types/mongodb": "^3.5.33",
diff --git a/packages/hydrooj/src/service/monitor.ts b/packages/hydrooj/src/service/monitor.ts
index f9d0c2803..1922eabb3 100644
--- a/packages/hydrooj/src/service/monitor.ts
+++ b/packages/hydrooj/src/service/monitor.ts
@@ -1,6 +1,6 @@
 import cluster from 'cluster';
 import crypto from 'crypto';
-import axios from 'axios';
+import superagent from 'superagent';
 import { dump } from 'js-yaml';
 import db from './db';
 import * as bus from './bus';
@@ -49,9 +49,11 @@ export async function feedback() {
         cpu: inf.cpu,
         flags: inf.flags,
     }));
-    axios.post('https://feedback.undefined.moe/', { payload }).catch(() => {
-        logger.warn('Cannot connect to hydro center.');
-    });
+    superagent.post('https://feedback.undefined.moe/')
+        .send({ payload })
+        .catch(() => {
+            logger.warn('Cannot connect to hydro center.');
+        });
 }
 
 export async function update() {