diff --git a/scripts/build_cop_profiles/CentralHeatingCopApproximator.py b/scripts/build_cop_profiles/CentralHeatingCopApproximator.py
index 7bf15b30..08dd6a1a 100644
--- a/scripts/build_cop_profiles/CentralHeatingCopApproximator.py
+++ b/scripts/build_cop_profiles/CentralHeatingCopApproximator.py
@@ -91,6 +91,7 @@ class CentralHeatingCopApproximator(BaseCopApproximator):
     ) -> Union[xr.DataArray, np.array]:
         Calculate the ratio of evaporation to compression work based on approximation.
     """
+
     def __init__(
         self,
         forward_temperature_celsius: Union[xr.DataArray, np.array],
diff --git a/scripts/build_cop_profiles/DecentralHeatingCopApproximator.py b/scripts/build_cop_profiles/DecentralHeatingCopApproximator.py
index d84b6795..e5f58af4 100644
--- a/scripts/build_cop_profiles/DecentralHeatingCopApproximator.py
+++ b/scripts/build_cop_profiles/DecentralHeatingCopApproximator.py
@@ -70,7 +70,8 @@ class DecentralHeatingCopApproximator(BaseCopApproximator):
 
     def approximate_cop(self) -> Union[xr.DataArray, np.array]:
         """
-        Compute the COP values using quadratic regression for air-/ground-source heat pumps.
+        Compute the COP values using quadratic regression for air-/ground-
+        source heat pumps.
 
         Returns
         -------