diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 4656c8196..4f3cfdb32 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.30.1",
+    "version": "2.30.2",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/handler/judge.ts b/packages/hydrooj/src/handler/judge.ts
index f74a64d13..592ed3902 100644
--- a/packages/hydrooj/src/handler/judge.ts
+++ b/packages/hydrooj/src/handler/judge.ts
@@ -157,7 +157,7 @@ class JudgeConnectionHandler extends ConnectionHandler {
     }
 
     async message(msg) {
-        if (msg.key !== 'ping') logger.info('%o', msg);
+        if (msg.key !== 'ping') logger[['status', 'next'].includes(msg.key) ? 'debug' : 'info']('%o', msg);
         if (msg.key === 'next') await next(msg);
         else if (msg.key === 'end') {
             await end({ judger: this.user._id, ...msg }).catch((e) => logger.error(e));
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index c0b3ae472..0cf054f97 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -42,6 +42,11 @@ const logger = new Logger('server');
 export const app = new Koa();
 export const server = http.createServer(app.callback());
 export const router = new Router();
+app.on('error', (error) => {
+    if (error.code !== 'EPIPE' && error.code !== 'ECONNRESET' && !error.message.includes('Parse Error')) {
+        logger.error('Koa app-level error', { error });
+    }
+});
 
 type MethodDecorator = (target: any, name: string, obj: any) => any;
 type Converter = (value: any) => any;