diff --git a/pastas/modelstats.py b/pastas/modelstats.py
index 0af90cb8..7cd6ca1d 100644
--- a/pastas/modelstats.py
+++ b/pastas/modelstats.py
@@ -29,6 +29,7 @@
 from pandas import DataFrame
 
 from pastas.typing import Model, TimestampType
+
 from .decorators import model_tmin_tmax
 from .stats import diagnostics, metrics
 
diff --git a/pastas/recharge.py b/pastas/recharge.py
index 4ae8b0f4..722030eb 100644
--- a/pastas/recharge.py
+++ b/pastas/recharge.py
@@ -43,6 +43,7 @@
 from pandas import DataFrame
 
 from pastas.typing import ArrayLike
+
 from .decorators import njit
 
 logger = getLogger(__name__)
diff --git a/pastas/stressmodels.py b/pastas/stressmodels.py
index da242ed9..b34b002c 100644
--- a/pastas/stressmodels.py
+++ b/pastas/stressmodels.py
@@ -24,6 +24,7 @@
 from scipy.signal import fftconvolve
 
 from pastas.typing import ArrayLike, Model, Recharge, RFunc, TimestampType
+
 from .decorators import njit, set_parameter
 from .recharge import Linear
 from .rfunc import Exponential, HantushWellModel, One