diff --git a/oscar_invoices/apps.py b/oscar_invoices/apps.py
index 4429637..abae715 100644
--- a/oscar_invoices/apps.py
+++ b/oscar_invoices/apps.py
@@ -10,6 +10,8 @@ class InvoicesConfig(OscarConfig):
 
     default_permissions = ["is_staff"]
 
+    default = True
+
     def ready(self):
         from . import views
         self.invoice_view = views.InvoicePreviewView