diff --git a/base_user_role/models/role.py b/base_user_role/models/role.py
index f537d340..00e2a90f 100644
--- a/base_user_role/models/role.py
+++ b/base_user_role/models/role.py
@@ -65,7 +65,7 @@ class ResUsersRole(models.Model):
 
     @api.multi
     def unlink(self):
-        users = self.mapped("user_ids")
+        users = self.sudo().mapped("user_ids")
         res = super(ResUsersRole, self).unlink()
         users.set_groups_from_roles(force=True)
         return res
@@ -73,7 +73,7 @@ class ResUsersRole(models.Model):
     @api.multi
     def update_users(self):
         """Update all the users concerned by the roles identified by `ids`."""
-        users = self.mapped("user_ids")
+        users = self.sudo().mapped("user_ids")
         users.set_groups_from_roles()
         return True