diff --git a/src/app/components/add-task/add-task.component.ts b/src/app/components/add-task/add-task.component.ts
index 58231df..ad36988 100644
--- a/src/app/components/add-task/add-task.component.ts
+++ b/src/app/components/add-task/add-task.component.ts
@@ -13,7 +13,7 @@ import { AuthService } from '../../services/auth.service';
 import { firstValueFrom, map } from 'rxjs';
 import { TaskService } from '../../services/task.service';
 import { ApiService } from '../../services/api.service';
-import { TaskUpdateService } from '../../services/task-update.service';
+import { UpdateNotifierService } from '../../services/update-notifier.service';
 import { ToastNotificationService } from '../../services/toast-notification.servic';
 
 @Component({
@@ -51,7 +51,7 @@ export class AddTaskComponent implements OnInit {
     private taskService: TaskService,
     private apiService: ApiService,
     private authService: AuthService,
-    private taskUpdateService: TaskUpdateService,
+    private updateNotifierService: UpdateNotifierService,
     private toastNotificationService: ToastNotificationService,
     private route: ActivatedRoute,
     private router: Router
@@ -380,7 +380,7 @@ export class AddTaskComponent implements OnInit {
       this.apiService.saveNewTask(taskWithoutId).subscribe({
         next: (response) => {
           this.toastNotificationService.createTaskSuccessToast();
-          this.taskUpdateService.notifyTaskUpdate();
+          this.updateNotifierService.notifyUpdate('task');
           this.removeTaskData(ngForm);
           this.closeOverlay();
           this.router.navigate(['/board']);
diff --git a/src/app/components/board/board.component.ts b/src/app/components/board/board.component.ts
index 09dccb8..51c5ba5 100644
--- a/src/app/components/board/board.component.ts
+++ b/src/app/components/board/board.component.ts
@@ -13,7 +13,7 @@ import { Task } from '../../interfaces/task.interface';
 import { TaskService } from '../../services/task.service';
 import { LoadingSpinnerComponent } from '../../shared/components/loading-spinner/loading-spinner.component';
 import { finalize, Subject, takeUntil } from 'rxjs';
-import { TaskUpdateService } from '../../services/task-update.service';
+import { UpdateNotifierService } from '../../services/update-notifier.service';
 import { ToastNotificationService } from '../../services/toast-notification.servic';
 import { ResizeService } from '../../services/resize.service';
 
@@ -46,7 +46,7 @@ export class BoardComponent {
     private resizeService: ResizeService,
     private taskService: TaskService,
     private apiService: ApiService,
-    private taskUpdateService: TaskUpdateService,
+    private updateNotifierService: UpdateNotifierService,
     private toastNotificationService: ToastNotificationService,
     private router: Router
   ) {}
@@ -95,7 +95,7 @@ export class BoardComponent {
   }
 
   private subscribeToTaskUpdates() {
-    this.taskUpdateService.taskUpdated$
+    this.updateNotifierService.taskUpdated$
       .pipe(takeUntil(this.destroy$))
       .subscribe(() => {
         this.loadAllTasks();
diff --git a/src/app/components/contacts/contact-detail/contact-detail.component.ts b/src/app/components/contacts/contact-detail/contact-detail.component.ts
index 49165ac..c0273a9 100644
--- a/src/app/components/contacts/contact-detail/contact-detail.component.ts
+++ b/src/app/components/contacts/contact-detail/contact-detail.component.ts
@@ -14,6 +14,7 @@ import { User } from '../../../interfaces/user.interface';
 import { OverlayService } from '../../../services/overlay.service';
 import { ApiService } from '../../../services/api.service';
 import { ToastNotificationService } from '../../../services/toast-notification.servic';
+import { UpdateNotifierService } from '../../../services/update-notifier.service';
 
 @Component({
   selector: 'app-contact-detail',
@@ -36,7 +37,8 @@ export class ContactDetailComponent {
     private overlayService: OverlayService,
     private userService: UserService,
     private apiService: ApiService,
-    private toastNotificationService: ToastNotificationService
+    private toastNotificationService: ToastNotificationService,
+    private updateNotifierService: UpdateNotifierService
   ) {}
 
   ngOnChanges(changes: SimpleChanges) {
@@ -97,14 +99,11 @@ export class ContactDetailComponent {
     this.isMobileNavbarOpen = false;
   }
 
-  /**
-   * Opens the delete contact dialog by setting the appropriate flags in the shared service.
-   * This method is used by the contact details component to open the delete contact dialog when the user clicks the delete button.
-   */
   async deleteContact(userId: string) {
     try {
       await lastValueFrom(this.apiService.deleteUserById(userId));
       this.toastNotificationService.deleteContactSuccessToast();
+      this.updateNotifierService.notifyUpdate('contact');
       this.closeUserDetails();
     } catch (error) {
       console.error(error);
diff --git a/src/app/components/contacts/contacts.component.html b/src/app/components/contacts/contacts.component.html
index a677a6a..8025ab4 100644
--- a/src/app/components/contacts/contacts.component.html
+++ b/src/app/components/contacts/contacts.component.html
@@ -18,8 +18,8 @@
       @for (sortLetter of this.getUniqueFirstLetters(); track sortLetter) {
       <div class="first-letter">{{ sortLetter }}</div>
       <div class="line"></div>
-      @for (user of this.filterUsersByFirstLetter(sortLetter); track user; let
-      index = $index) {
+      @for (user of this.filterUsersByFirstLetter(sortLetter); track user.id;
+      let index = $index) {
       <div
         class="contact"
         (click)="openUserDetails(user.id)"
diff --git a/src/app/components/contacts/contacts.component.ts b/src/app/components/contacts/contacts.component.ts
index 16d0d1a..82e7a0c 100644
--- a/src/app/components/contacts/contacts.component.ts
+++ b/src/app/components/contacts/contacts.component.ts
@@ -5,8 +5,9 @@ import { ContactDetailComponent } from './contact-detail/contact-detail.componen
 import { FirebaseService } from '../../services/firebase.service';
 import { TranslateModule } from '@ngx-translate/core';
 import { UserService } from '../../services/user.service';
-import { finalize } from 'rxjs';
+import { finalize, Subject, takeUntil } from 'rxjs';
 import { OverlayService } from '../../services/overlay.service';
+import { UpdateNotifierService } from '../../services/update-notifier.service';
 
 @Component({
   selector: 'app-contacts',
@@ -16,6 +17,8 @@ import { OverlayService } from '../../services/overlay.service';
   styleUrl: './contacts.component.scss',
 })
 export class ContactsComponent {
+  private destroy$ = new Subject<void>();
+
   allUsers: User[] = [];
   currentUser: User | null = null;
   selectedUserId: string | null = null;
@@ -25,7 +28,8 @@ export class ContactsComponent {
   constructor(
     public firebaseService: FirebaseService,
     private userService: UserService,
-    private overlayService: OverlayService
+    private overlayService: OverlayService,
+    private updateNotifierService: UpdateNotifierService
   ) {}
 
   /**
@@ -35,6 +39,7 @@ export class ContactsComponent {
     this.onResize();
     this.loadAllUsers();
     this.loadCurrentUser();
+    this.subscribeToUserUpdates();
   }
 
   loadAllUsers(): void {
@@ -53,6 +58,14 @@ export class ContactsComponent {
       });
   }
 
+  private subscribeToUserUpdates() {
+    this.updateNotifierService.contactUpdated$
+      .pipe(takeUntil(this.destroy$))
+      .subscribe(() => {
+        this.loadAllUsers();
+      });
+  }
+
   loadCurrentUser(): void {
     this.userService.getCurrentUser().subscribe((userData) => {
       this.currentUser = userData;
diff --git a/src/app/services/task-update.service.ts b/src/app/services/task-update.service.ts
deleted file mode 100644
index 3f64f68..0000000
--- a/src/app/services/task-update.service.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import { Injectable } from '@angular/core';
-import { Subject } from 'rxjs';
-
-@Injectable({
-  providedIn: 'root',
-})
-export class TaskUpdateService {
-  private taskUpdatedSubject = new Subject<void>();
-  taskUpdated$ = this.taskUpdatedSubject.asObservable();
-
-  notifyTaskUpdate() {
-    this.taskUpdatedSubject.next();
-  }
-}
diff --git a/src/app/services/update-notifier.service.ts b/src/app/services/update-notifier.service.ts
new file mode 100644
index 0000000..6f2fc99
--- /dev/null
+++ b/src/app/services/update-notifier.service.ts
@@ -0,0 +1,19 @@
+import { Injectable } from '@angular/core';
+import { Subject } from 'rxjs';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class UpdateNotifierService {
+  private updateSubjects: Record<string, Subject<void>> = {
+    task: new Subject<void>(),
+    contact: new Subject<void>(),
+  };
+
+  taskUpdated$ = this.updateSubjects['task'].asObservable();
+  contactUpdated$ = this.updateSubjects['contact'].asObservable();
+
+  notifyUpdate(type: 'task' | 'contact') {
+    this.updateSubjects[type].next();
+  }
+}
diff --git a/src/app/shared/components/overlay/task-overlay/task-overlay.component.ts b/src/app/shared/components/overlay/task-overlay/task-overlay.component.ts
index 8905943..c77946d 100644
--- a/src/app/shared/components/overlay/task-overlay/task-overlay.component.ts
+++ b/src/app/shared/components/overlay/task-overlay/task-overlay.component.ts
@@ -11,7 +11,7 @@ import { TaskService } from '../../../../services/task.service';
 import { AuthService } from '../../../../services/auth.service';
 import { map } from 'rxjs';
 import { ApiService } from '../../../../services/api.service';
-import { TaskUpdateService } from '../../../../services/task-update.service';
+import { UpdateNotifierService } from '../../../../services/update-notifier.service';
 import { ToastNotificationService } from '../../../../services/toast-notification.servic';
 
 @Component({
@@ -35,7 +35,7 @@ export class TaskOverlayComponent implements OnInit {
     private taskService: TaskService,
     private authService: AuthService,
     private apiService: ApiService,
-    private taskUpdateService: TaskUpdateService,
+    private updateNotifierService: UpdateNotifierService,
     private toastNotificationService: ToastNotificationService,
     private router: Router,
     private route: ActivatedRoute
@@ -126,7 +126,7 @@ export class TaskOverlayComponent implements OnInit {
     this.apiService.deleteTaskById(taskId).subscribe({
       next: (task) => {
         this.toastNotificationService.deleteTaskSuccessToast();
-        this.taskUpdateService.notifyTaskUpdate();
+        this.updateNotifierService.notifyUpdate('task');
       },
       error: (err) => {
         console.error('Error deleting task', err);