diff --git a/src/c3nav/editor/views/edit.py b/src/c3nav/editor/views/edit.py
index 575e458f..c6dde44b 100644
--- a/src/c3nav/editor/views/edit.py
+++ b/src/c3nav/editor/views/edit.py
@@ -1,5 +1,4 @@
 import mimetypes
-import os
 import typing
 from contextlib import suppress
 
@@ -739,7 +738,7 @@ def sourceimage(request, filename):
         return PermissionDenied
 
     try:
-        return HttpResponse(open(os.path.join(settings.SOURCES_ROOT, filename), 'rb'),
+        return HttpResponse(open(settings.SOURCES_ROOT / filename, 'rb'),
                             content_type=mimetypes.guess_type(filename)[0])
     except FileNotFoundError:
         raise Http404
diff --git a/src/c3nav/mapdata/management/commands/clearmapcache.py b/src/c3nav/mapdata/management/commands/clearmapcache.py
index 967efc4b..a57f6e06 100644
--- a/src/c3nav/mapdata/management/commands/clearmapcache.py
+++ b/src/c3nav/mapdata/management/commands/clearmapcache.py
@@ -33,7 +33,7 @@ class Command(BaseCommand):
             for filename in os.listdir(settings.CACHE_ROOT):
                 if filename.startswith('history_base_'):
                     logger.info('Deleting %s...' % filename)
-                    os.remove(os.path.join(settings.CACHE_ROOT, filename))
+                    os.remove(settings.CACHE_ROOT / filename)
             logger.info('Base history deleted.')
 
         if not settings.HAS_CELERY and not options['no_process']:
diff --git a/src/c3nav/mapdata/management/commands/rendermap.py b/src/c3nav/mapdata/management/commands/rendermap.py
index 4c7fa226..394bf9fa 100644
--- a/src/c3nav/mapdata/management/commands/rendermap.py
+++ b/src/c3nav/mapdata/management/commands/rendermap.py
@@ -1,5 +1,4 @@
 import argparse
-import os
 
 from django.conf import settings
 from django.core.management.base import BaseCommand, CommandError
@@ -109,8 +108,7 @@ class Command(BaseCommand):
                                    min_width=options['min_width'])
 
             name = options['name'] or ('level_%s' % level.short_label)
-            filename = os.path.join(settings.RENDER_ROOT,
-                                    '%s.%s' % (name, options['filetype']))
+            filename = settings.RENDER_ROOT / ('%s.%s' % (name, options['filetype']))
 
             render = renderer.render(get_engine(options['filetype']), center=not options['no_center'])
             data = render.render(filename)
diff --git a/src/c3nav/mapdata/management/commands/statssnapshot.py b/src/c3nav/mapdata/management/commands/statssnapshot.py
index b189b37d..f2ae1681 100644
--- a/src/c3nav/mapdata/management/commands/statssnapshot.py
+++ b/src/c3nav/mapdata/management/commands/statssnapshot.py
@@ -1,5 +1,4 @@
 import json
-import os
 
 from django.conf import settings
 from django.core.management.base import BaseCommand
@@ -20,10 +19,9 @@ class Command(BaseCommand):
     def handle(self, *args, **options):
         result = stats_snapshot(reset=options['reset'])
         if options['save']:
-            filename = os.path.join(
-                settings.STATS_ROOT,
-                'stats__%s__%s.json' % (result['start_date'], result['end_date'])
-            ).replace(' ', '_').replace(':', '-')
+            filename = settings.STATS_ROOT / (
+                ('stats__%s__%s.json' % (result['start_date'], result['end_date'])).replace(' ', '_').replace(':', '-')
+            )
             json.dump(result, open(filename, 'w'), indent=4)
             print('saved to %s' % filename)
         else:
diff --git a/src/c3nav/mapdata/migrations/0016_remove_source_image.py b/src/c3nav/mapdata/migrations/0016_remove_source_image.py
index b194ea43..8eb6bafd 100644
--- a/src/c3nav/mapdata/migrations/0016_remove_source_image.py
+++ b/src/c3nav/mapdata/migrations/0016_remove_source_image.py
@@ -11,7 +11,7 @@ from django.db import migrations
 def move_sources(apps, schema_editor):
     Source = apps.get_model('mapdata', 'Source')
     for source in Source.objects.all():
-        with open(os.path.join(settings.SOURCES_ROOT, source.name), 'wb') as f:
+        with open(settings.SOURCES_ROOT / source.name), 'wb') as f:
             f.write(source.image)
 
 
diff --git a/src/c3nav/mapdata/models/source.py b/src/c3nav/mapdata/models/source.py
index 6a20a7f0..8dcbbfc5 100644
--- a/src/c3nav/mapdata/models/source.py
+++ b/src/c3nav/mapdata/models/source.py
@@ -1,5 +1,3 @@
-import os
-
 from django.conf import settings
 from django.db import models
 from django.utils.translation import gettext_lazy as _
@@ -21,7 +19,7 @@ class Source(BoundsMixin, AccessRestrictionMixin, models.Model):
 
     @property
     def filepath(self):
-        return os.path.join(settings.SOURCES_ROOT, self.name)
+        return settings.SOURCES_ROOT / self.name
 
     @property
     def title(self):
diff --git a/src/c3nav/mapdata/models/update.py b/src/c3nav/mapdata/models/update.py
index dfeba68d..65326c1d 100644
--- a/src/c3nav/mapdata/models/update.py
+++ b/src/c3nav/mapdata/models/update.py
@@ -104,7 +104,7 @@ class MapUpdate(models.Model):
                 yield cls.objects.select_for_update().get(pk=earliest.pk)
 
     def _changed_geometries_filename(self):
-        return os.path.join(settings.CACHE_ROOT, 'changed_geometries', 'update_%d.pickle' % self.pk)
+        return settings.CACHE_ROOT / 'changed_geometries' / ('update_%d.pickle' % self.pk)
 
     class ProcessUpdatesAlreadyRunning(Exception):
         pass
diff --git a/src/c3nav/mapdata/render/renderdata.py b/src/c3nav/mapdata/render/renderdata.py
index f2146f70..5cb64193 100644
--- a/src/c3nav/mapdata/render/renderdata.py
+++ b/src/c3nav/mapdata/render/renderdata.py
@@ -1,5 +1,4 @@
 import operator
-import os
 import pickle
 import threading
 from collections import deque
@@ -297,7 +296,7 @@ class LevelRenderData:
 
     @staticmethod
     def _level_filename(pk):
-        return os.path.join(settings.CACHE_ROOT, 'render_data_level_%d.pickle' % pk)
+        return settings.CACHE_ROOT / ('render_data_level_%d.pickle' % pk)
 
     @classmethod
     def get(cls, level):
diff --git a/src/c3nav/mapdata/utils/cache/indexed.py b/src/c3nav/mapdata/utils/cache/indexed.py
index 5d5de039..785a735a 100644
--- a/src/c3nav/mapdata/utils/cache/indexed.py
+++ b/src/c3nav/mapdata/utils/cache/indexed.py
@@ -1,5 +1,4 @@
 import math
-import os
 import struct
 import threading
 
@@ -197,7 +196,7 @@ class LevelGeometryIndexed(GeometryIndexed):
     @classmethod
     def level_filename(cls, level_id, mode):
         from django.conf import settings
-        return os.path.join(settings.CACHE_ROOT, '%s_%s_level_%d' % (cls.variant_name, mode, level_id))
+        return settings.CACHE_ROOT / ('%s_%s_level_%d' % (cls.variant_name, mode, level_id))
 
     @classmethod
     def open_level(cls, level_id, mode, **kwargs):
diff --git a/src/c3nav/mapdata/utils/cache/package.py b/src/c3nav/mapdata/utils/cache/package.py
index 04edf180..2c372b39 100644
--- a/src/c3nav/mapdata/utils/cache/package.py
+++ b/src/c3nav/mapdata/utils/cache/package.py
@@ -21,7 +21,7 @@ class CachePackage:
     def save(self, filename=None, compression=None):
         if filename is None:
             from django.conf import settings
-            filename = os.path.join(settings.CACHE_ROOT, 'package.tar')
+            filename = settings.CACHE_ROOT / 'package.tar'
             if compression is not None:
                 filename += '.' + compression
 
@@ -75,7 +75,7 @@ class CachePackage:
     def open(cls, filename=None):
         if filename is None:
             from django.conf import settings
-            filename = os.path.join(settings.CACHE_ROOT, 'package.tar')
+            filename = settings.CACHE_ROOT / 'package.tar'
         return cls.read(open(filename, 'rb'))
 
     cached = None
diff --git a/src/c3nav/mapdata/views.py b/src/c3nav/mapdata/views.py
index 8f99a747..3bb780ac 100644
--- a/src/c3nav/mapdata/views.py
+++ b/src/c3nav/mapdata/views.py
@@ -99,9 +99,9 @@ def tile(request, level, zoom, x, y, access_permissions=None):
 
     # get tile cache last update
     if settings.CACHE_TILES:
-        tile_dirname = os.path.sep.join((settings.TILES_ROOT, str(level), str(zoom), str(x), str(y)))
-        last_update_filename = os.path.join(tile_dirname, 'last_update')
-        tile_filename = os.path.join(tile_dirname, access_cache_key+'.png')
+        tile_dirname = settings.TILES_ROOT / str(level) / str(zoom) / str(x) / str(y)
+        last_update_filename = tile_dirname / 'last_update'
+        tile_filename = tile_dirname / (access_cache_key+'.png')
 
         # get tile cache last update
         tile_cache_update_cache_key = 'mapdata:tile-cache-update:%d-%d-%d-%d' % (level, zoom, x, y)
@@ -114,7 +114,7 @@ def tile(request, level, zoom, x, y, access_permissions=None):
                 pass
 
         if tile_cache_update != base_cache_key:
-            os.system('rm -rf '+os.path.join(tile_dirname, '*'))
+            os.system('rm -rf '+(tile_dirname / '*'))
         else:
             try:
                 with open(tile_filename, 'rb') as f:
@@ -171,7 +171,7 @@ def map_history(request, level, mode, filetype):
 def get_cache_package(request, filetype):
     enforce_tile_secret_auth(request)
 
-    filename = os.path.join(settings.CACHE_ROOT, 'package.'+filetype)
+    filename = settings.CACHE_ROOT / ('package.'+filetype)
     f = open(filename, 'rb')
 
     f.seek(0, os.SEEK_END)
diff --git a/src/c3nav/routing/locator.py b/src/c3nav/routing/locator.py
index b07c6f0d..e52d0cbd 100644
--- a/src/c3nav/routing/locator.py
+++ b/src/c3nav/routing/locator.py
@@ -1,5 +1,4 @@
 import operator
-import os
 import pickle
 import re
 import threading
@@ -17,7 +16,7 @@ from c3nav.routing.router import Router
 
 
 class Locator:
-    filename = os.path.join(settings.CACHE_ROOT, 'locator')
+    filename = settings.CACHE_ROOT / 'locator'
 
     def __init__(self, stations, spaces):
         self.stations = stations
@@ -42,7 +41,7 @@ class Locator:
 
     @classmethod
     def build_filename(cls, update):
-        return os.path.join(settings.CACHE_ROOT, 'locator_%s.pickle' % MapUpdate.build_cache_key(*update))
+        return settings.CACHE_ROOT / ('locator_%s.pickle' % MapUpdate.build_cache_key(*update))
 
     @classmethod
     def load_nocache(cls, update):
diff --git a/src/c3nav/routing/rangelocator.py b/src/c3nav/routing/rangelocator.py
index e66fb447..b6d09e4a 100644
--- a/src/c3nav/routing/rangelocator.py
+++ b/src/c3nav/routing/rangelocator.py
@@ -1,4 +1,3 @@
-import os
 import pickle
 import threading
 from dataclasses import dataclass
@@ -21,7 +20,7 @@ class RangeLocatorBeacon:
 
 @dataclass
 class RangeLocator:
-    filename = os.path.join(settings.CACHE_ROOT, 'rangelocator')
+    filename = settings.CACHE_ROOT / 'rangelocator'
 
     beacons: dict[str, RangeLocatorBeacon]
 
@@ -45,7 +44,7 @@ class RangeLocator:
 
     @classmethod
     def build_filename(cls, update):
-        return os.path.join(settings.CACHE_ROOT, 'rangelocator_%s.pickle' % MapUpdate.build_cache_key(*update))
+        return settings.CACHE_ROOT / ('rangelocator_%s.pickle' % MapUpdate.build_cache_key(*update))
 
     @classmethod
     def load_nocache(cls, update):
diff --git a/src/c3nav/routing/router.py b/src/c3nav/routing/router.py
index 11b544d2..c2d4d320 100644
--- a/src/c3nav/routing/router.py
+++ b/src/c3nav/routing/router.py
@@ -1,6 +1,5 @@
 import logging
 import operator
-import os
 import pickle
 import threading
 from collections import deque, namedtuple
@@ -29,7 +28,7 @@ logger = logging.getLogger('c3nav')
 
 
 class Router:
-    filename = os.path.join(settings.CACHE_ROOT, 'router')
+    filename = settings.CACHE_ROOT / 'router'
 
     def __init__(self, levels, spaces, areas, pois, groups, restrictions, nodes, edges, waytypes, graph):
         self.levels = levels
@@ -273,7 +272,7 @@ class Router:
 
     @classmethod
     def build_filename(cls, update):
-        return os.path.join(settings.CACHE_ROOT, 'router_%s.pickle' % MapUpdate.build_cache_key(*update))
+        return settings.CACHE_ROOT / ('router_%s.pickle' % MapUpdate.build_cache_key(*update))
 
     @classmethod
     def load_nocache(cls, update):