diff --git a/examples/authentication/main.py b/examples/authentication/main.py
index 9161c66e7..eb9e6078a 100755
--- a/examples/authentication/main.py
+++ b/examples/authentication/main.py
@@ -12,18 +12,23 @@
 from fastapi.responses import RedirectResponse
 from starlette.middleware.base import BaseHTTPMiddleware
 
+import nicegui.globals
 from nicegui import app, ui
 
 # in reality users passwords would obviously need to be hashed
 passwords = {'user1': 'pass1', 'user2': 'pass2'}
 
+unrestricted_page_routes = ['/login']
+
 
 class AuthMiddleware(BaseHTTPMiddleware):
-    """This middleware redirects the user to the login page if they are not authenticated."""
+    """This middleware restricts access to all NiceGUI pages.
+    It redirects the user to the login page if they are not authenticated."""
 
     async def dispatch(self, request: Request, call_next):
-        if request.url.path not in ['/login'] and not app.storage.user.get('authenticated', False):
-            return RedirectResponse(f'/login?referrer_path={quote(request.url.path)}')
+        if not app.storage.user.get('authenticated', False):
+            if request.url.path in nicegui.globals.page_routes.values() and request.url.path not in unrestricted_page_routes:
+                return RedirectResponse(f'/login?referrer_path={quote(request.url.path)}')
         return await call_next(request)