diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index 2a67d2cc3..92bf1b473 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -530,7 +530,7 @@ export interface FileNode {
 
 export interface EventDoc {
     ack: string[];
-    event: string;
+    event: number | string;
     payload: string;
     expire: Date;
 }