diff --git a/packages/hydrojudge/src/sandbox/client.ts b/packages/hydrojudge/src/sandbox/client.ts
index c9449002b..df960e103 100644
--- a/packages/hydrojudge/src/sandbox/client.ts
+++ b/packages/hydrojudge/src/sandbox/client.ts
@@ -10,7 +10,7 @@ import {
 } from './interface';
 
 let url: string;
-const UA = `HydroJudge/${version.split('v')[1]} (${Math.random().toString(36).substring(2, 8)})`;
+const UA = `HydroJudge/${version} (${Math.random().toString(36).substring(2, 8)})`;
 
 export class Stream extends EventEmitter {
     private ws: WebSocket;