diff --git a/backend/management/commands/update.py b/backend/management/commands/update.py
new file mode 100644
index 0000000..f7eeee3
--- /dev/null
+++ b/backend/management/commands/update.py
@@ -0,0 +1,38 @@
+from django.core.management.base import BaseCommand, CommandError
+from backend.models import Backend
+
+class Command(BaseCommand):
+    help = ("Usage: python manage.py update <backend_slug> <key> <value>\n"
+            "\n"
+            "Update key/value in database.")
+
+    # Copied from warmup.py, is this really needed?
+    def __init__(self, *args, **kwargs):
+        super().__init__( *args, **kwargs)
+
+    # Custom log function.
+    def log(self, msg=""):
+        print(msg)
+
+    # Command line arguments.
+    def add_arguments(self, parser):
+        parser.add_argument("backend_slug", nargs=1,
+                            help="Slug of the selected backend")
+        parser.add_argument("key", nargs=1,
+                            help="Key to update")
+        parser.add_argument("value", nargs=1,
+                            help="New value to set")
+
+    def handle(self, *args, returnLog=False, **options):
+        backend_slug = options["backend_slug"][0]
+        key = options["key"][0]
+        value = options["value"][0]
+
+        self.log(f"Update database: set {key} to {value} ...")
+        try:
+            backend = Backend.objects.filter(slug=backend_slug).get()
+            setattr(backend, key, value)
+            backend.save()
+        except Exception as e:
+            self.log(f"ERROR: {e}")
+            return
diff --git a/backend/templates/index.html b/backend/templates/index.html
index b97aa97..1779f00 100644
--- a/backend/templates/index.html
+++ b/backend/templates/index.html
@@ -86,6 +86,7 @@ <h4>Basic settings</h4>
                     <tr><th>Backend name</th><td>{{ backend.name }}</td></tr>
                     <tr><th>Backend slug</th><td id="backend-slug">{{ backend.slugify }}</td></tr>
                     <tr><th>Backend URL</th><td>{{ backend.baseUrl }}</td></tr>
+                    {% if backend.mapViewBaseURL != "" %}<tr><th>Petrimaps URL</th><td>{{ backend.mapViewBaseURL }}</td></tr>{% endif %}
                     <tr><th>Is default:</th><td>{% if backend.isDefault %}Yes{% else %}No{% endif %}</td></tr>
                     <tr><th>Fill known prefixes:</th><td>{% if backend.fillPrefixes %}Yes{% else %}No{% endif %}</td></tr>
                     <tr><th>Languages:</th><td>{{ backend.filteredLanguage }}</td></tr>