diff --git a/barsys/forms.py b/barsys/forms.py
index 2593505..ff6c7e5 100644
--- a/barsys/forms.py
+++ b/barsys/forms.py
@@ -4,7 +4,7 @@
 from crispy_forms.helper import FormHelper
 from django import forms
 from django.contrib.auth import forms as auth_forms
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from .models import *
 from pybarsys.settings import PybarsysPreferences
@@ -53,7 +53,7 @@ def __init__(self, *args, **kwargs):
                 )
 
         self.helper = FormHelper()
-        self.helper.template = "bootstrap/table_inline_formset.html"
+        self.helper.template = "bootstrap3/table_inline_formset.html"
         self.helper.form_tag = False
 
 
diff --git a/barsys/templates/barsys/admin/base.html b/barsys/templates/barsys/admin/base.html
index f3d28c6..f0c8ca4 100644
--- a/barsys/templates/barsys/admin/base.html
+++ b/barsys/templates/barsys/admin/base.html
@@ -1,7 +1,7 @@
 {% extends 'bootstrap3/bootstrap3.html' %}
 
 {% load bootstrap3 %}
-{% load staticfiles %}
+{% load static %}
 {% block bootstrap3_title %}Barsys management{% endblock %}
 {% block bootstrap3_extra_head %}
     <meta name="viewport" content="width=device-width, initial-scale=1.0">{% endblock %}
diff --git a/barsys/urls.py b/barsys/urls.py
index 086f6f7..4add104 100644
--- a/barsys/urls.py
+++ b/barsys/urls.py
@@ -1,4 +1,4 @@
-from django.conf.urls import url
+from django.urls import re_path as url
 
 from . import views
 
diff --git a/pybarsys/settings.py b/pybarsys/settings.py
index cf4f663..dfd15dc 100644
--- a/pybarsys/settings.py
+++ b/pybarsys/settings.py
@@ -26,11 +26,11 @@
     "barsys.apps.BarsysConfig",
     "django_filters",
     "crispy_forms",
+    "crispy_bootstrap3",
     "rest_framework",
 ]
 
 MIDDLEWARE = [
-    "debug_toolbar.middleware.DebugToolbarMiddleware",
     "django.middleware.security.SecurityMiddleware",
     "django.contrib.sessions.middleware.SessionMiddleware",
     "django.middleware.common.CommonMiddleware",
@@ -63,6 +63,8 @@
 
 DATABASES = {"default": env.db()}
 
+DEFAULT_AUTO_FIELD = "django.db.models.AutoField"  # keep 32-bit PKs; avoids migrations on existing tables
+
 AUTH_USER_MODEL = "barsys.User"  # custom Barsys user model
 
 # Password validation
@@ -111,12 +113,10 @@
     TEMPLATES[0]["OPTIONS"]["string_if_invalid"] = "!INVALID!"
     if env.bool("SHOW_DEBUG_TOOLBAR", default=False):
         INSTALLED_APPS.append("debug_toolbar")
+        MIDDLEWARE.append("debug_toolbar.middleware.DebugToolbarMiddleware")
         DEBUG_TOOLBAR_CONFIG = {
             "SHOW_TOOLBAR_CALLBACK": lambda e: True,
-            "DISABLE_PANELS": {
-                "debug_toolbar.panels.redirects.RedirectsPanel",
-                "debug_toolbar.panels.templates.TemplatesPanel",
-            },
+            "DISABLE_PANELS": set(),
         }
 
         DEBUG_TOOLBAR_PANELS = [
@@ -131,7 +131,7 @@
             "debug_toolbar.panels.cache.CachePanel",
             "debug_toolbar.panels.signals.SignalsPanel",
             "debug_toolbar.panels.logging.LoggingPanel",
-            "debug_toolbar.panels.redirects.RedirectsPanel",
+            "debug_toolbar.panels.history.HistoryPanel",
             "debug_toolbar.panels.profiling.ProfilingPanel",
         ]
 
diff --git a/pybarsys/urls.py b/pybarsys/urls.py
index b5a32f9..05a7d00 100644
--- a/pybarsys/urls.py
+++ b/pybarsys/urls.py
@@ -15,7 +15,7 @@
 """
 
 from django.conf import settings
-from django.conf.urls import include, url
+from django.urls import include, re_path as url
 from django.contrib.auth import views as auth_views
 
 from barsys.forms import LoginForm
@@ -39,7 +39,7 @@
     ),
 ]
 
-if settings.DEBUG:
+if "debug_toolbar" in settings.INSTALLED_APPS:
     import debug_toolbar
 
     urlpatterns = [
diff --git a/requirements.txt b/requirements.txt
index 39c5bf8..20e3231 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,10 @@
-Django~=2.2.0
-django-bootstrap3~=21.2
-django-crispy-forms~=1.7.2
-django-debug-toolbar~=1.11
-django-filter~=21.1
-djangorestframework~=3.11.2
-django-environ~=0.4.5
-babel~=2.9.0
-gunicorn~=20.1.0
+Django~=5.2.0
+django-bootstrap3~=26.1
+django-crispy-forms~=2.6
+crispy-bootstrap3~=2024.1
+django-debug-toolbar~=6.3
+django-filter~=25.2
+djangorestframework~=3.17
+django-environ~=0.13
+babel~=2.18
+gunicorn~=26.0