diff --git a/sphinx_autobuild/__main__.py b/sphinx_autobuild/__main__.py
index bc60629..82150f5 100644
--- a/sphinx_autobuild/__main__.py
+++ b/sphinx_autobuild/__main__.py
@@ -42,8 +42,9 @@ def main():
         pre_build_commands=pre_build_commands,
     )
 
-    ignore_handler = _get_ignore_handler(args.ignore, args.re_ignore, outdir,
-                                         args.warnings_file, args.doctree_dir)
+    ignore_handler = _get_ignore_handler(
+        args.ignore, args.re_ignore, outdir, args.warnings_file, args.doctree_dir
+    )
     server.watch(srcdir, builder, ignore=ignore_handler)
     for dirpath in args.additional_watched_dirs:
         dirpath = os.path.realpath(dirpath)
@@ -54,7 +55,9 @@ def main():
         builder()
 
     if args.openbrowser is True:
-        server.serve(port=port_num, host=args.host, root=outdir, open_url_delay=args.delay)
+        server.serve(
+            port=port_num, host=args.host, root=outdir, open_url_delay=args.delay
+        )
     else:
         server.serve(port=port_num, host=args.host, root=outdir)
 
@@ -112,7 +115,7 @@ def _get_parser():
 
 
 def _add_autobuild_arguments(parser):
-    group = parser.add_argument_group('autobuild options')
+    group = parser.add_argument_group("autobuild options")
     group.add_argument(
         "--port",
         type=int,
diff --git a/sphinx_autobuild/build.py b/sphinx_autobuild/build.py
index 3055b7c..2f4ee1f 100644
--- a/sphinx_autobuild/build.py
+++ b/sphinx_autobuild/build.py
@@ -4,6 +4,7 @@
 import subprocess
 
 from colorama import Fore, Style
+
 # This isn't public API, but we want to avoid a subprocess call
 from sphinx.cmd.build import build_main
 
diff --git a/sphinx_autobuild/ignore.py b/sphinx_autobuild/ignore.py
index 10a9594..cdbdf2a 100644
--- a/sphinx_autobuild/ignore.py
+++ b/sphinx_autobuild/ignore.py
@@ -12,8 +12,10 @@ def __init__(self, regular, regex_based):
         self.regex_based_patterns = list(map(re.compile, regex_based))
 
     def __repr__(self):
-        return (f"Ignore(regular={self.regular_patterns!r}, "
-                f"regex_based={self.regex_based_patterns!r})")
+        return (
+            f"Ignore(regular={self.regular_patterns!r}, "
+            f"regex_based={self.regex_based_patterns!r})"
+        )
 
     def __call__(self, path):
         """Determine if 'path' should be ignored."""