diff --git a/backend/Dockerfile b/backend/Dockerfile
index 385ccd3..b693b16 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -7,6 +7,6 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 COPY . .
 
-EXPOSE 8000
+EXPOSE 8765
 
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8765"]
diff --git a/backend/app/main.py b/backend/app/main.py
index 8f4a695..406147a 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -10,7 +10,7 @@ app = FastAPI(title="Kopilka API", version="1.0.0")
 
 app.add_middleware(
     CORSMiddleware,
-    allow_origins=["http://localhost:5173", "http://localhost:3000"],
+    allow_origins=["http://localhost:5173", "http://localhost:4321"],
     allow_credentials=True,
     allow_methods=["*"],
     allow_headers=["*"],
diff --git a/docker-compose.yml b/docker-compose.yml
index 2b6c47d..ec90130 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,7 +4,7 @@ services:
       context: ./backend
       dockerfile: Dockerfile
     ports:
-      - "8000:8000"
+      - "8765:8765"
     environment:
       - PYTHONUNBUFFERED=1
     volumes:
@@ -16,7 +16,7 @@ services:
       context: ./frontend
       dockerfile: Dockerfile
     ports:
-      - "3000:3000"
+      - "4321:4321"
     depends_on:
       - backend
     restart: unless-stopped
diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index eaa5a7f..4e5bb89 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -9,5 +9,5 @@ RUN npm run build
 FROM nginx:alpine
 COPY --from=builder /app/dist /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/conf.d/default.conf
-EXPOSE 3000
+EXPOSE 4321
 CMD ["nginx", "-g", "daemon off;"]
diff --git a/frontend/nginx.conf b/frontend/nginx.conf
index 62f98db..6446c06 100644
--- a/frontend/nginx.conf
+++ b/frontend/nginx.conf
@@ -1,9 +1,9 @@
 server {
-    listen 3000;
+    listen 4321;
     server_name _;
 
     resolver 127.0.0.11 valid=10s;
-    set $backend_url http://backend:8000;
+    set $backend_url http://backend:8765;
 
     root /usr/share/nginx/html;
     index index.html;
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index 8279d17..d254bf8 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -5,9 +5,9 @@ export default defineConfig({
   plugins: [react()],
   server: {
     host: true,
-    port: 3000,
+    port: 4321,
     proxy: {
-      '/api': 'http://backend:8000',
+      '/api': 'http://backend:8765',
     },
   },
 })