diff --git a/docs/build.py b/docs/build.py
index df8e329..0b9b55c 100644
--- a/docs/build.py
+++ b/docs/build.py
@@ -3,8 +3,8 @@
 from mizu import parse
 from jinja2 import Template, Environment, FileSystemLoader
 
-env = Environment(loader=FileSystemLoader('.'), trim_blocks=False)
-template = env.get_template('main.tpl')
+env = Environment(loader=FileSystemLoader("."), trim_blocks=False)
+template = env.get_template("main.tpl")
 with open("main.md", "r") as f:
     raw = f.read()
 text = template.render(content=parse(raw))
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 586c9d9..078eb02 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -9,28 +9,24 @@
 import os
 import sys
 
-sys.path.insert(0, os.path.abspath('../../'))
+sys.path.insert(0, os.path.abspath("../../"))
 
 
-project = 'mizu'
-copyright = '2022, tuna2134'
-author = 'tuna2134'
+project = "mizu"
+copyright = "2022, tuna2134"
+author = "tuna2134"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
-extensions = [
-    "sphinx.ext.autodoc",
-    "sphinx.ext.napoleon"
-]
+extensions = ["sphinx.ext.autodoc", "sphinx.ext.napoleon"]
 
-templates_path = ['_templates']
+templates_path = ["_templates"]
 exclude_patterns = []
 
 
-
 # -- Options for HTML output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
 
-html_theme = 'furo'
-html_static_path = ['_static']
+html_theme = "furo"
+html_static_path = ["_static"]
diff --git a/mizu/mizu.pyi b/mizu/mizu.pyi
index a46c530..dd1c01d 100644
--- a/mizu/mizu.pyi
+++ b/mizu/mizu.pyi
@@ -4,18 +4,8 @@ from .options import Options
 
 import asyncio
 
-
 class Mizu:
-    def __init__(
-        self, options: Options = Options()
-    ) -> None:
-        ...
-    
-    def set_loop(self, loop: asyncio.AbstractEventLoop) -> None:
-        ...
-
-    def parse(self, text: str) -> str:
-        ...
-
-    async def aioparse(self, text: str) -> str:
-        ...
+    def __init__(self, options: Options = Options()) -> None: ...
+    def set_loop(self, loop: asyncio.AbstractEventLoop) -> None: ...
+    def parse(self, text: str) -> str: ...
+    async def aioparse(self, text: str) -> str: ...
diff --git a/mizu/options.py b/mizu/options.py
index ee2f07f..f04d222 100644
--- a/mizu/options.py
+++ b/mizu/options.py
@@ -1,5 +1,6 @@
 # Mizu's markdown options
 
+
 class Options:
     """Options for Markdown parsing.
 
@@ -11,17 +12,23 @@ class Options:
         smart_punctuation (bool): Enable smart punctuation parsing.
         heading_attribute (bool): Enable heading attribute parsing.
     """
+
     tables: bool
     footnotes: bool
     strikethrough: bool
     tasklists: bool
     smart_punctuation: bool
     heading_attribute: bool
-    
+
     def __init__(
-        self, *, tables: bool = False, footnotes: bool = False,
-        strikethrough: bool = False, tasklists: bool = False,
-        smart_punctuation: bool = False, heading_attribute: bool = False
+        self,
+        *,
+        tables: bool = False,
+        footnotes: bool = False,
+        strikethrough: bool = False,
+        tasklists: bool = False,
+        smart_punctuation: bool = False,
+        heading_attribute: bool = False,
     ) -> None:
         self.tables = tables
         self.footnotes = footnotes
@@ -34,6 +41,10 @@ def __init__(
     def all(cls) -> "Options":
         """Returns an Options object with all options enabled."""
         return cls(
-            tables=True, footnotes=True, strikethrough=True,
-            tasklists=True, smart_punctuation=True, heading_attribute=True
+            tables=True,
+            footnotes=True,
+            strikethrough=True,
+            tasklists=True,
+            smart_punctuation=True,
+            heading_attribute=True,
         )
diff --git a/mizu/parse.py b/mizu/parse.py
index 81f2bf2..b2c7cbf 100644
--- a/mizu/parse.py
+++ b/mizu/parse.py
@@ -12,18 +12,20 @@ class Mizu:
         options (Options): Options for parser.
         loop (AbstractEventLoop): Event loop
     """
+
     def __init__(
-        self, options: Options = Options(),
+        self,
+        options: Options = Options(),
         loop: Optional[AbstractEventLoop] = None,
     ) -> None:
         self.__parser = _Mizu(options)
         if loop:
             self.__parser.set_loop(loop)
-    
+
     def parse(self, text: str) -> str:
         """
         Parse markdown text to html.
-        
+
         Args:
             text (str): Markdown text.
         """
@@ -32,8 +34,8 @@ def parse(self, text: str) -> str:
     async def aioparse(self, text: str) -> str:
         """
         Parse markdown text to html (async version)
-        
+
         Args:
             text (str): Markdown text
         """
-        return await self.__parser.aioparse(text)
\ No newline at end of file
+        return await self.__parser.aioparse(text)
diff --git a/tests/test_async.py b/tests/test_async.py
index c4aa743..d361bde 100644
--- a/tests/test_async.py
+++ b/tests/test_async.py
@@ -7,4 +7,4 @@
 @pytest.mark.asyncio
 async def test_parse():
     m = Mizu(loop=asyncio.get_running_loop())
-    assert await m.aioparse("# hello") == "<h1>hello</h1>\n"
\ No newline at end of file
+    assert await m.aioparse("# hello") == "<h1>hello</h1>\n"
diff --git a/tests/test_md.py b/tests/test_md.py
index c3fa7c4..333019a 100644
--- a/tests/test_md.py
+++ b/tests/test_md.py
@@ -3,5 +3,6 @@
 
 mizu = Mizu()
 
+
 def test_parse():
-    assert mizu.parse("# Hello") == "<h1>Hello</h1>\n"
\ No newline at end of file
+    assert mizu.parse("# Hello") == "<h1>Hello</h1>\n"