diff --git a/__init__.py b/__init__.py
index d424af7..1cab67e 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,8 +1,8 @@
 # The COPYRIGHT file at the top level of this repository contains the full
 # copyright notices and license terms.
 from trytond.pool import Pool
-import sale
-import dash
+from . import sale
+from . import dash
 
 
 def register():
diff --git a/dash.py b/dash.py
index 515654f..ccd0583 100644
--- a/dash.py
+++ b/dash.py
@@ -2,8 +2,6 @@
 # this repository contains the full copyright notices and license terms.
 from trytond.pool import PoolMeta
 
-__all__ = ['DashApp']
-
 
 class DashApp(metaclass=PoolMeta):
     __name__ = 'dash.app'
diff --git a/sale.py b/sale.py
index 4b1a96d..9cf5281 100644
--- a/sale.py
+++ b/sale.py
@@ -10,8 +10,6 @@ from trytond.pool import Pool, PoolMeta
 from trytond.transaction import Transaction
 from trytond.model import ModelView, ModelSQL, fields
 
-__all__ = ['Sale', 'AppDelivery', 'AppSaleOrder']
-
 
 class Sale(metaclass=PoolMeta):
     __name__ = 'sale.sale'