diff --git a/cntmanage/cntmanage/settings_prod.py b/cntmanage/cntmanage/settings_prod.py
index 6f112d2..b91b28f 100644
--- a/cntmanage/cntmanage/settings_prod.py
+++ b/cntmanage/cntmanage/settings_prod.py
@@ -47,6 +47,7 @@ INSTALLED_APPS = [
     'colorfield',
     'import_export',
     'django_admin_action_forms',
+    'polymorphic'
 ]
 
 # Import Export plugin settings
@@ -56,7 +57,7 @@ IMPORT_EXPORT_SKIP_ADMIN_LOG = True
 IMPORT_FORMATS = [CSV]
 
 MIDDLEWARE = [
-    'flightslot.middleware.RedirectNonSuperuserFromAdminMiddleware',
+    'flightslot.middleware.RedirectNonSuperuserFromAdminMiddleware', # custom middleware to show "user" page to non superuser
     'django.middleware.security.SecurityMiddleware',
     'whitenoise.middleware.WhiteNoiseMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
diff --git a/cntmanage/flightslot/middleware.py b/cntmanage/flightslot/middleware.py
index ba198ab..0489a01 100644
--- a/cntmanage/flightslot/middleware.py
+++ b/cntmanage/flightslot/middleware.py
@@ -8,11 +8,7 @@ class RedirectNonSuperuserFromAdminMiddleware:
 
     def __call__(self, request: HttpRequest):
         # Se l'utente è loggato, non è superuser e prova ad andare in /admin/...
-        if hasattr(request,"user"):
-            if (
-                request.path.startswith("/admin/") and 
-                hasattr(request.user, 'student')
-            ):
+        if hasattr(request, "user") and hasattr(request.user, 'student'):
+            if "/admin/" in request.path:
                 return redirect("/user/")  # redirect automatico
-
         return self.get_response(request)