diff --git a/physics/physics_factory.py b/physics/physics_factory.py
index eb311fc2..f2d983d1 100644
--- a/physics/physics_factory.py
+++ b/physics/physics_factory.py
@@ -12,7 +12,7 @@ class PhysicsFactory:
   """
   PhysicsFactor class
   """
-  def __init__(self, handler, city, base_path=Path(Path.cwd().parent / 'libs/data/physics')):
+  def __init__(self, handler, city, base_path=Path(Path(__file__).parent.parent / 'data/physics')):
     self._handler = '_' + handler.lower().replace(' ', '_')
     self._city = city
     self._base_path = base_path
diff --git a/usage/usage_feeders/us_base_usage_parameters.py b/usage/usage_feeders/us_base_usage_parameters.py
index f214bfd8..847dc74b 100644
--- a/usage/usage_feeders/us_base_usage_parameters.py
+++ b/usage/usage_feeders/us_base_usage_parameters.py
@@ -19,7 +19,7 @@ class UsBaseUsageParameters:
     self._city = city
     # todo: control not archetype found
     # ToDo: this is using the german library as a temporary approach, need to use/define a library for US
-    path = str(Path.cwd() / 'data/usage/de_library.xml')
+    path = str(Path(__file__).parent.parent.parent / 'data/usage/de_library.xml')
     print('usage:', path)
     with open(path) as xml:
       self._library = xmltodict.parse(xml.read(), force_list='zoneUsageVariant')