diff --git a/matemat/primitives/Product.py b/matemat/primitives/Product.py
index 72aaa1a..8974366 100644
--- a/matemat/primitives/Product.py
+++ b/matemat/primitives/Product.py
@@ -1,6 +1,17 @@
 
+from inspect import stack
+
+
 class Product(object):
 
+    def __init__(self):
+        print(stack())
+        self._product_id: int = 0
+        self._name: str = ''
+        self._price_member: int = 0
+        self._price_non_member: int = 0
+        raise NotImplementedError('This shoudt not be called!')
+
     def __init__(self,
                  product_id: int,
                  name: str,
diff --git a/setup.py b/setup.py
index 034a818..0fc605f 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 
 setup(
     name='matemat',
-    version='2.00',
+    version='2.0',
     packages=['matemat'],
     url='',
     license='',