diff --git a/frontend/src/app/components/side-menu/categories-menu/categories-menu.component.html b/frontend/src/app/components/side-menu/categories-menu/categories-menu.component.html
index 8506529..564bd98 100644
--- a/frontend/src/app/components/side-menu/categories-menu/categories-menu.component.html
+++ b/frontend/src/app/components/side-menu/categories-menu/categories-menu.component.html
@@ -1,5 +1,5 @@
-@for(category of categories$ | async; track category) {
-    <div class="category {{category.isOpenned ? 'openned' : ''}}">
+@for(category of categories(); track category) {
+<div class="category {{category.isOpenned ? 'openned' : ''}}">
         <div id="category-{{category.id}}" class="category-header" (click)="setOpenned(category)">
             {{category.name}}
             <mat-icon>chevron_right</mat-icon>
diff --git a/frontend/src/app/components/side-menu/categories-menu/categories-menu.component.ts b/frontend/src/app/components/side-menu/categories-menu/categories-menu.component.ts
index f498224..2c4a606 100644
--- a/frontend/src/app/components/side-menu/categories-menu/categories-menu.component.ts
+++ b/frontend/src/app/components/side-menu/categories-menu/categories-menu.component.ts
@@ -1,9 +1,10 @@
 import { CommonModule } from "@angular/common";
-import { Component, EventEmitter, inject, OnInit, Output } from "@angular/core";
+import { Component, EventEmitter, inject, OnDestroy, OnInit, Output, signal } from "@angular/core";
 import { MatIconModule } from "@angular/material/icon";
 import { DisplayableCategory, SideMenuService } from "../side-menu.service";
-import { Observable } from "rxjs";
+import { Observable, Subscription } from "rxjs";
 import { RouterModule } from "@angular/router";
+import { Category } from "../../../core/rest-services/category/model/category";
 
 @Component({
 	selector: 'app-categories-menu',
@@ -12,17 +13,21 @@ import { RouterModule } from "@angular/router";
   templateUrl: './categories-menu.component.html',
   styleUrl: './categories-menu.component.scss'
 })
-export class CategoriesMenuComponent implements OnInit {
-  private sideMenuService = inject(SideMenuService);
+export class CategoriesMenuComponent implements OnInit, OnDestroy {
   @Output()
   categoryClicked = new EventEmitter<void>();
+  private sideMenuService = inject(SideMenuService);
+  private categoriesSubscription?: Subscription;
+  categories = signal<DisplayableCategory[]>([]);
 
   ngOnInit(): void {
+    this.categoriesSubscription = this.sideMenuService.categories$
+      .subscribe(categories => this.categories.set(categories));
     this.sideMenuService.loadCategories();
   }
 
-  get categories$(): Observable<DisplayableCategory[]> {
-    return this.sideMenuService.categories$;
+  ngOnDestroy(): void {
+    this.categoriesSubscription?.unsubscribe();
   }
 
   setOpenned(category: DisplayableCategory): void {
diff --git a/frontend/src/app/components/side-menu/side-menu.component.html b/frontend/src/app/components/side-menu/side-menu.component.html
index 3be46fe..d5eb4a4 100644
--- a/frontend/src/app/components/side-menu/side-menu.component.html
+++ b/frontend/src/app/components/side-menu/side-menu.component.html
@@ -1,4 +1,4 @@
-<div class="menu {{ isOpenned ? 'displayed' : '' }}">
+<div class="menu {{ isOpenned() ? 'displayed' : '' }}">
     <h1>
         <a [routerLink]="['/home']">
             <img src="assets/images/codiki.png" alt="logo"/>
@@ -11,4 +11,4 @@
     <h2 i18n>Categories</h2>
     <app-categories-menu (categoryClicked)="close()"></app-categories-menu>
 </div>
-<div class="overlay {{ isOpenned ? 'displayed' : ''}}" (click)="close()"></div>
+<div class="overlay {{ isOpenned() ? 'displayed' : ''}}" (click)="close()"></div>
diff --git a/frontend/src/app/components/side-menu/side-menu.component.ts b/frontend/src/app/components/side-menu/side-menu.component.ts
index b9133ac..8747b82 100644
--- a/frontend/src/app/components/side-menu/side-menu.component.ts
+++ b/frontend/src/app/components/side-menu/side-menu.component.ts
@@ -1,4 +1,4 @@
-import { Component } from '@angular/core';
+import { Component, signal } from '@angular/core';
 import { MatIconModule } from '@angular/material/icon';
 import { MatTooltipModule } from '@angular/material/tooltip';
 import { RouterModule } from '@angular/router';
@@ -12,13 +12,13 @@ import { CategoriesMenuComponent } from './categories-menu/categories-menu.compo
   styleUrl: './side-menu.component.scss'
 })
 export class SideMenuComponent {
-  isOpenned: boolean = false;
+  isOpenned = signal(false);
 
   open(): void {
-    this.isOpenned = true;
+    this.isOpenned.set(true);
   }
 
   close(): void {
-    this.isOpenned = false;
+    this.isOpenned.set(false);
   }
 }