diff --git a/product_usability/__init__.py b/product_usability/__init__.py
index fe50f8f..69f7bab 100644
--- a/product_usability/__init__.py
+++ b/product_usability/__init__.py
@@ -1,3 +1,3 @@
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from . import product
-from . import pricelist
+from . import models
diff --git a/product_usability/models/__init__.py b/product_usability/models/__init__.py
new file mode 100644
index 0000000..7ef8d55
--- /dev/null
+++ b/product_usability/models/__init__.py
@@ -0,0 +1,4 @@
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import product
+from . import pricelist
diff --git a/product_usability/pricelist.py b/product_usability/models/pricelist.py
similarity index 100%
rename from product_usability/pricelist.py
rename to product_usability/models/pricelist.py
diff --git a/product_usability/product.py b/product_usability/models/product.py
similarity index 100%
rename from product_usability/product.py
rename to product_usability/models/product.py