diff --git a/scripts/build_cop_profiles/run.py b/scripts/build_cop_profiles/run.py
index 1b2c0a35..23229e98 100644
--- a/scripts/build_cop_profiles/run.py
+++ b/scripts/build_cop_profiles/run.py
@@ -2,9 +2,9 @@
 # SPDX-FileCopyrightText: : 2020-2024 The PyPSA-Eur Authors
 #
 # SPDX-License-Identifier: MIT
-
 """
-Approximate heat pump coefficient-of-performance (COP) profiles for different heat sources and systems.
+Approximate heat pump coefficient-of-performance (COP) profiles for different
+heat sources and systems.
 
 For central heating, this is based on Jensen et al. (2018) (c.f. `CentralHeatingCopApproximator <CentralHeatingCopApproximator.py>`_) and for decentral heating, the approximation is based on Staffell et al. (2012) (c.f. `DecentralHeatingCopApproximator <DecentralHeatingCopApproximator.py>`_).