diff --git a/power_plot.py b/power_plot.py
index 2f54ddcf3310bf73952c2330b0ab3311ce830184..859ef0dfa2770bb4926970ee0bbaeab97e164f1c 100755
--- a/power_plot.py
+++ b/power_plot.py
@@ -52,8 +52,9 @@ class PowerPlot:
         fig.suptitle(f"Maximum frequency", fontsize=16)
         fig.tight_layout()
         (self.totalplot,) = self.ax.plot([], [], "-", color="blue")
-        (self.totalplothighlight,) = self.ax.plot([], [], ".", color="red", markersize=10)
-
+        (self.totalplothighlight,) = self.ax.plot(
+            [], [], ".", color="red", markersize=10
+        )
 
     def set_totalplot_values(self, xdata, ydata):
         self.totalplot.set_data(xdata, ydata)
@@ -166,7 +167,9 @@ class PowerPlotMainWindow(QMainWindow):
             time_now = float(values[0])
             power_now = float(values[1])
 
-            self.time_dt = np.append(self.time_dt, date2num(datetime.utcfromtimestamp(time_now)))
+            self.time_dt = np.append(
+                self.time_dt, date2num(datetime.utcfromtimestamp(time_now))
+            )
             self.data = np.append(self.data, power_now)
 
             self.last_x_buffer = np.roll(self.last_x_buffer, -1)