diff --git a/city_model_structure/building.py b/city_model_structure/building.py
index 46c503eb..2be49a40 100644
--- a/city_model_structure/building.py
+++ b/city_model_structure/building.py
@@ -25,7 +25,7 @@ class Building(CityObject):
   Building(CityObject) class
   """
   def __init__(self, name, lod, surfaces, terrains, year_of_construction, function, lower_corner, attic_heated=0,
-               basement_heated=0, week_day_schedule, saturday_schedule, sunday_schedule):
+               basement_heated=0):
     super().__init__(lod, surfaces, name)
     self._basement_heated = basement_heated
     self._attic_heated = attic_heated
diff --git a/physics/physics_factory.py b/physics/physics_factory.py
index f2d983d1..8e563eec 100644
--- a/physics/physics_factory.py
+++ b/physics/physics_factory.py
@@ -25,13 +25,13 @@ class PhysicsFactory:
     UsPhysicsParameters(self._city, self._base_path)
 
   def _ca(self):
-    raise Exception('Not implemented')
+    raise NotImplementedError
 
   def _de(self):
-    raise Exception('Not implemented')
+    raise NotImplementedError
 
   def _es(self):
-    raise Exception('Not implemented')
+    raise NotImplementedError
 
   def factory(self):
     """
diff --git a/requirements.txt b/requirements.txt
index 34d94ffa..ba603773 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ pyny3d~=0.2
 matplotlib~=3.2.1
 Shapely~=1.7.0
 pandas~=1.0.4
-pip~=20.1.1
+pip>=20.1.1
 pyzmq~=19.0.1
 pexpect~=4.8.0
 tornado~=6.0.4