diff --git a/pi_mqtt_gpio/modules/mcp3008.py b/pi_mqtt_gpio/modules/mcp3008.py
index 18c583a5464cf0437d45d56018208d85e7b72b85..75e1b0c62846468a1ecf987f7778848915102d22 100644
--- a/pi_mqtt_gpio/modules/mcp3008.py
+++ b/pi_mqtt_gpio/modules/mcp3008.py
@@ -9,35 +9,53 @@ SENSOR_SCHEMA = {
         required=False,
         empty=False,
         default="CH0",
-        allowed=["CH0", "CH1", "CH2", "CH3", "CH4", "CH5", "CH6", "CH7",
-                 "DF0", "DF1", "DF2", "DF3", "DF4", "DF5", "DF6", "DF7"],
+        allowed=[
+            "CH0",
+            "CH1",
+            "CH2",
+            "CH3",
+            "CH4",
+            "CH5",
+            "CH6",
+            "CH7",
+            "DF0",
+            "DF1",
+            "DF2",
+            "DF3",
+            "DF4",
+            "DF5",
+            "DF6",
+            "DF7",
+        ],
     )
 }
 
 _LOG = logging.getLogger("mqtt_gpio")
 
+
 class Sensor(GenericSensor):
     """
     Implementation of MCP3008 ADC sensor.
     """
+
     def __init__(self, config):
         import Adafruit_MCP3008
         import Adafruit_GPIO.SPI as SPI
 
         """init the mcp on SPI CE0"""
-        SPI_PORT   = 0
+        SPI_PORT = 0
         SPI_DEVICE = 0
         self.mcp = Adafruit_MCP3008.MCP3008(spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE))
 
         self.channels = {
-          "CH0": 0,
-          "CH1": 1,
-          "CH2": 2,
-          "CH3": 3,
-          "CH4": 4,
-          "CH5": 5,
-          "CH6": 6,
-          "CH7": 7
+            "CH0": 0,
+            "CH1": 1,
+            "CH2": 2,
+            "CH3": 3,
+            "CH4": 4,
+            "CH5": 5,
+            "CH6": 6,
+            "CH7": 7,
         }
 
     def setup_sensor(self, config):
@@ -55,4 +73,4 @@ class Sensor(GenericSensor):
 
     def cleanup(self):
         """close the adc, to proper shut down the spi bus"""
-        #self.adc.close()
+        # self.adc.close()