diff --git a/src/snek/docs/app.py b/src/snek/docs/app.py
index 5e00d98..50a4245 100644
--- a/src/snek/docs/app.py
+++ b/src/snek/docs/app.py
@@ -1,33 +1,43 @@
-from app.app import Application as BaseApplication
-import pathlib 
+import pathlib
+
 from aiohttp import web
+from app.app import Application as BaseApplication
+
 from snek.system.markdown import MarkdownExtension
 
-from snek.system.markdown import render_markdown 
 
 class Application(BaseApplication):
 
-    def __init__(self, path=None, *args,**kwargs):
+    def __init__(self, path=None, *args, **kwargs):
         self.path = pathlib.Path(path)
         template_path = self.path
 
-        super().__init__(template_path=template_path ,*args, **kwargs)
-        self.jinja2_env.add_extension(MarkdownExtension) 
-        
-        self.router.add_get("/{tail:.*}",self.handle_document)
+        super().__init__(template_path=template_path, *args, **kwargs)
+        self.jinja2_env.add_extension(MarkdownExtension)
+
+        self.router.add_get("/{tail:.*}", self.handle_document)
 
     async def handle_document(self, request):
-        relative_path = request.match_info['tail'].strip("/")
-        if relative_path == '':
-            relative_path = 'index.html'
+        relative_path = request.match_info["tail"].strip("/")
+        if relative_path == "":
+            relative_path = "index.html"
         document_path = self.path.joinpath(relative_path)
         if not document_path.exists():
-            return web.Response(status=404,body=b'Resource is not found on this server.',content_type="text/plain")
+            return web.Response(
+                status=404,
+                body=b"Resource is not found on this server.",
+                content_type="text/plain",
+            )
         if document_path.is_dir():
             document_path = document_path.joinpath("index.html")
         if not document_path.exists():
-            return web.Response(status=404,body=b'Resource is not found on this server.',content_type="text/plain")
-        
-        response = await self.render_template(str(document_path.relative_to(self.path)),request)
-        return response
+            return web.Response(
+                status=404,
+                body=b"Resource is not found on this server.",
+                content_type="text/plain",
+            )
 
+        response = await self.render_template(
+            str(document_path.relative_to(self.path)), request
+        )
+        return response