diff --git a/copanier/models.py b/copanier/models.py
index 72cdbdc..cd43b9c 100644
--- a/copanier/models.py
+++ b/copanier/models.py
@@ -84,7 +84,7 @@ class Person(Base):
 
     @property
     def is_staff(self):
-        return self.email in config.STAFF
+        return not config.STAFF or self.email in config.STAFF
 
 
 @dataclass
diff --git a/tests/test_models.py b/tests/test_models.py
index b957bbe..f11051c 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -2,6 +2,7 @@ from datetime import datetime, timedelta
 
 import pytest
 
+from copanier import config
 from copanier.models import Delivery, Product, Person, Order, ProductOrder
 
 
@@ -88,3 +89,17 @@ def test_can_load_delivery(delivery):
     delivery.persist()
     loaded = Delivery.load(delivery.id)
     assert loaded.producer == "Corto"
+
+
+def test_person_is_staff_if_email_is_in_config(monkeypatch):
+    monkeypatch.setattr(config, 'STAFF', ["foo@bar.fr"])
+    person = Person(email="foo@bar.fr")
+    assert person.is_staff
+    person = Person(email="foo@bar.org")
+    assert not person.is_staff
+
+
+def test_person_is_staff_if_no_staff_in_config(monkeypatch):
+    monkeypatch.setattr(config, 'STAFF', [])
+    person = Person(email="foo@bar.fr")
+    assert person.is_staff