diff --git a/src/API.ts b/src/API.ts
index da3dde6..8adc595 100644
--- a/src/API.ts
+++ b/src/API.ts
@@ -1899,8 +1899,8 @@ export class UserAPI {
   // =============================================================
 
   register = (name: string, operation: EventOperation<AbstractEvent>): void => {
-    AbstractEvent.prototype[name] = function (this: AbstractEvent) {
-        return operation(this);
+    AbstractEvent.prototype[name] = function (this: AbstractEvent, ...args: any[]) {
+        return operation(this, ...args);
     };
   }
 
diff --git a/src/classes/AbstractEvents.ts b/src/classes/AbstractEvents.ts
index d49ea6f..4c44352 100644
--- a/src/classes/AbstractEvents.ts
+++ b/src/classes/AbstractEvents.ts
@@ -5,7 +5,7 @@ import {
   safeScale
 } from "zifferjs";
 
-export type EventOperation<T> = (instance: T) => void;
+export type EventOperation<T> = (instance: T, ...args: any[]) => void;
 
 export interface AbstractEvent {
   [key: string]: any