diff --git a/customer_service.py b/customer_service.py
index 6da380c..22efcbd 100644
--- a/customer_service.py
+++ b/customer_service.py
@@ -116,6 +116,7 @@ class CustomerService(metaclass=PoolMeta):
     def __setup__(cls):
         super(CustomerService, cls).__setup__()
         cls.party.required = True
+        cls.media.readonly = False
         if new_sel not in cls.media.selection:
             cls.media.selection = NEW_MEDIA