diff --git a/frontend/src/app/shared/components/debt-dialog/debt-dialog.component.ts b/frontend/src/app/shared/components/debt-dialog/debt-dialog.component.ts
index a57dfe0..dd60fdc 100644
--- a/frontend/src/app/shared/components/debt-dialog/debt-dialog.component.ts
+++ b/frontend/src/app/shared/components/debt-dialog/debt-dialog.component.ts
@@ -10,7 +10,7 @@ import {
 } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { animate, style, transition, trigger } from '@angular/animations';
-import { interval, takeWhile } from 'rxjs';
+import { interval, Subscription, takeWhile } from 'rxjs';
 
 @Component({
   selector: 'app-debt-dialog',
@@ -131,7 +131,7 @@ export class DebtDialogComponent implements OnInit, OnDestroy {
 
   visible = false;
   timeLeft = signal(30);
-  private timerSubscription: any;
+  private timerSubscription: Subscription | undefined;
   private warningSound = new Audio('assets/sounds/warning.mp3');
 
   ngOnInit() {