diff --git a/src/common/Page.ts b/src/common/Page.ts
index 17f3b634..38e9f900 100644
--- a/src/common/Page.ts
+++ b/src/common/Page.ts
@@ -507,8 +507,8 @@ export class Page extends EventEmitter {
     client.on('Target.detachedFromTarget', (event) => {
       const worker = this._workers.get(event.sessionId);
       if (!worker) return;
-      this.emit(PageEmittedEvents.WorkerDestroyed, worker);
       this._workers.delete(event.sessionId);
+      this.emit(PageEmittedEvents.WorkerDestroyed, worker);
     });
 
     this._frameManager.on(FrameManagerEmittedEvents.FrameAttached, (event) =>