diff --git a/usbguard-notify.py b/usbguard-notify.py
index afdfead..750ed8a 100755
--- a/usbguard-notify.py
+++ b/usbguard-notify.py
@@ -5,19 +5,19 @@ import re
 import threading
 from subprocess import Popen, run, DEVNULL, PIPE
 
-USBGUARD_EXEC_NAME = shutil.which('usbguard')
-DUNSTIFY_EXEC_NAME = shutil.which('dunstify')
+USBGUARD_EXEC_NAME = shutil.which("usbguard")
+DUNSTIFY_EXEC_NAME = shutil.which("dunstify")
 open_notifications = {}
 
 
 def parse_event_type_and_id(stream):
     line = stream.readline()
-    if not line.startswith('[device] '):
+    if not line.startswith("[device] "):
         return None
-    event_type = re.findall('(?<=\\[device\\] )[a-zA-Z]+', line)
+    event_type = re.findall("(?<=\\[device\\] )[a-zA-Z]+", line)
     if len(event_type) == 0:
         return None
-    event_id = re.findall('(?<=id=)[0-9]+', line)
+    event_id = re.findall("(?<=id=)[0-9]+", line)
     if len(event_id) == 0:
         return None
     return event_type[0], int(event_id[0])
@@ -28,10 +28,10 @@ def parse_event_properties(stream, count):
     for _ in range(count):
         line = stream.readline()
         try:
-            sep_ind = line.index('=')
+            sep_ind = line.index("=")
             prop_name = line[1:sep_ind]
-            props[prop_name] = line[sep_ind + 1:-1]
-            if prop_name == 'device_rule':
+            props[prop_name] = line[sep_ind + 1 : -1]
+            if prop_name == "device_rule":
                 break
         except ValueError:
             continue
@@ -41,25 +41,35 @@ def parse_event_properties(stream, count):
 def get_name_and_id_from_rule(rule):
     name = re.findall('(?<=name ")[^"]+(?=")', rule)
     if len(name) == 0:
-        name = ''
+        name = ""
     else:
         name = name[0]
-    id = re.findall('(?<=id )[a-z0-9]{4}:[a-z0-9]{4}', rule)
+    id = re.findall("(?<=id )[a-z0-9]{4}:[a-z0-9]{4}", rule)
     if len(id) == 0:
-        id = ''
+        id = ""
     else:
         id = id[0]
     return name, id
 
 
 def prompt_device_action(dev_id, name, long_id):
-    proc = Popen([DUNSTIFY_EXEC_NAME, '-p',
-                  '-A', 'block,Block',
-                  '-A', 'allow,Allow',
-                  '-A', 'reject,Reject',
-                  f'{name} ({long_id})',
-                  'New Device'],
-                 stdout=PIPE, text=True, bufsize=0)
+    proc = Popen(
+        [
+            DUNSTIFY_EXEC_NAME,
+            "-p",
+            "-A",
+            "block,Block",
+            "-A",
+            "allow,Allow",
+            "-A",
+            "reject,Reject",
+            f"{name} ({long_id})",
+            "New Device",
+        ],
+        stdout=PIPE,
+        text=True,
+        bufsize=0,
+    )
     open_notifications[dev_id] = int(proc.stdout.readline())
     option = proc.communicate()[0][:-1]
     try:
@@ -67,24 +77,29 @@ def prompt_device_action(dev_id, name, long_id):
     except KeyError:
         pass
     match option:
-        case 'reject':
-            run([USBGUARD_EXEC_NAME, 'reject-device', long_id])
+        case "reject":
+            run([USBGUARD_EXEC_NAME, "reject-device", long_id])
 
-        case 'allow':
-            run([USBGUARD_EXEC_NAME, 'allow-device', long_id])
+        case "allow":
+            run([USBGUARD_EXEC_NAME, "allow-device", long_id])
 
         case _:
-            run([USBGUARD_EXEC_NAME, 'block-device', long_id])
+            run([USBGUARD_EXEC_NAME, "block-device", long_id])
 
 
 def close_notification(dev_id):
     if dev_id in open_notifications:
         notif_id = open_notifications.pop(dev_id)
-        run([DUNSTIFY_EXEC_NAME, '-C', str(notif_id)])
+        run([DUNSTIFY_EXEC_NAME, "-C", str(notif_id)])
 
 
-with Popen([USBGUARD_EXEC_NAME, 'watch'],
-           stdin=DEVNULL, stdout=PIPE, text=True, bufsize=0) as usbguard_proc:
+with Popen(
+    [USBGUARD_EXEC_NAME, "watch"],
+    stdin=DEVNULL,
+    stdout=PIPE,
+    text=True,
+    bufsize=0,
+) as usbguard_proc:
     new_devices = set()
     usbguard_proc.stdout.readline()  # get rid of initial connection message
     while True:
@@ -92,19 +107,21 @@ with Popen([USBGUARD_EXEC_NAME, 'watch'],
         if event_type_result is None:
             continue
         event_type, dev_id = event_type_result
-        if event_type not in ['PresenceChanged', 'PolicyApplied']:
+        if event_type not in ["PresenceChanged", "PolicyApplied"]:
             continue
         props = parse_event_properties(usbguard_proc.stdout, 3)
-        name, long_id = get_name_and_id_from_rule(props['device_rule'])
+        name, long_id = get_name_and_id_from_rule(props["device_rule"])
         match event_type:
-            case 'PresenceChanged':
-                if props['event'] == 'Insert':
+            case "PresenceChanged":
+                if props["event"] == "Insert":
                     new_devices.add(dev_id)
                 else:
                     close_notification(dev_id)
                     new_devices.discard(dev_id)
-            case 'PolicyApplied':
-                if props['target_new'] == 'block':
-                    threading.Thread(target=prompt_device_action,
-                                     args=(dev_id, name, long_id)).start()
+            case "PolicyApplied":
+                if props["target_new"] == "block":
+                    threading.Thread(
+                        target=prompt_device_action,
+                        args=(dev_id, name, long_id),
+                    ).start()
                     new_devices.discard(dev_id)