diff --git a/VorgabenUI/urls.py b/VorgabenUI/urls.py
index 963eac9..8454fab 100644
--- a/VorgabenUI/urls.py
+++ b/VorgabenUI/urls.py
@@ -41,7 +41,12 @@ urlpatterns = [
 ]
 
 # Serve media files (including cached diagrams)
-urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
+# django.conf.urls.static.static() is a no-op when DEBUG=False,
+# so we wire up the serve view directly for media files.
+from django.views.static import serve
+urlpatterns += [
+    re_path(r'^media/(?P<path>.*)$', serve, {'document_root': settings.MEDIA_ROOT}),
+]
 
 if settings.DEBUG:
     urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)