diff --git a/feigen/_base.py b/feigen/_base.py
index 58a2649..cfa76f6 100644
--- a/feigen/_base.py
+++ b/feigen/_base.py
@@ -1,6 +1,7 @@
 """
 Base type of feigen
 """
+
 from feigen import log
 
 
diff --git a/feigen/bspline.py b/feigen/bspline.py
index d1cf309..17f292b 100644
--- a/feigen/bspline.py
+++ b/feigen/bspline.py
@@ -302,9 +302,9 @@ def __init__(self, uri, degree=None, ncoeffs=None):  # noqa PLR0915
 
         # plotter initialization constants
         self._config["dim"] = 2  # 2D
-        self._config[
-            "n_subplots"
-        ] = 3  # geometry, boundary condition, server response
+        self._config["n_subplots"] = (
+            3  # geometry, boundary condition, server response
+        )
         self._config["geometry_plot"] = 0
         self._config["bc_plot"] = 1
         self._config["server_plot"] = 2
@@ -667,9 +667,9 @@ def _iganet_sync(self, evt):  # noqa ARG002
         eval_points = vedo.Points(np.vstack(geo_eval).T, c="white")
         eval_point_ids = eval_points.labels("id", on="points", font="VTK")
         self._state["server_plot_actors"]["evaluated_points"] = eval_points
-        self._state["server_plot_actors"][
-            "evaluated_point_ids"
-        ] = eval_point_ids.c("grey")
+        self._state["server_plot_actors"]["evaluated_point_ids"] = (
+            eval_point_ids.c("grey")
+        )
 
         # for some reason add won't work here
         self.show(
diff --git a/feigen/comm.py b/feigen/comm.py
index 6191465..ee69d9f 100644
--- a/feigen/comm.py
+++ b/feigen/comm.py
@@ -1,6 +1,7 @@
 """
 Communication helpers.
 """
+
 import uuid
 
 from websockets.exceptions import ConnectionClosed
diff --git a/feigen/jacobian_determinant.py b/feigen/jacobian_determinant.py
index f10964f..ccfd5cd 100644
--- a/feigen/jacobian_determinant.py
+++ b/feigen/jacobian_determinant.py
@@ -92,9 +92,9 @@ def __init__(self, spline=None):  # noqa PLR0915
 
         # plotter initialization constants
         self._c["dim"] = 2  # 2D
-        self._c[
-            "n_subplots"
-        ] = 2  # geometry, boundary condition, server response
+        self._c["n_subplots"] = (
+            2  # geometry, boundary condition, server response
+        )
         self._c["geometry_plot"] = 0
         self._c["server_plot"] = 1
 
diff --git a/feigen/nurbs_weights.py b/feigen/nurbs_weights.py
index 1295d4a..91bea40 100644
--- a/feigen/nurbs_weights.py
+++ b/feigen/nurbs_weights.py
@@ -109,9 +109,9 @@ def __init__(
 
         # plotter initialization constants
         self._c["dim"] = 2  # 2D
-        self._c[
-            "n_subplots"
-        ] = 2  # geometry, boundary condition, server response
+        self._c["n_subplots"] = (
+            2  # geometry, boundary condition, server response
+        )
         self._c["geometry_plot"] = 0
         self._c["server_plot"] = 1
 
diff --git a/feigen/poisson2d.py b/feigen/poisson2d.py
index 12cad5c..ad199ed 100644
--- a/feigen/poisson2d.py
+++ b/feigen/poisson2d.py
@@ -318,9 +318,9 @@ def __init__(self, spline=None):  # noqa PLR0915
 
         # plotter initialization constants
         self._c["dim"] = 2  # 2D
-        self._c[
-            "n_subplots"
-        ] = 3  # geometry, boundary condition, server response
+        self._c["n_subplots"] = (
+            3  # geometry, boundary condition, server response
+        )
         self._c["geometry_plot"] = 0
         self._c["bc_plot"] = 1
         self._c["server_plot"] = 2