diff --git a/src/rupload/app.py b/src/rupload/app.py
index dbff64e..ab77c72 100644
--- a/src/rupload/app.py
+++ b/src/rupload/app.py
@@ -276,9 +276,9 @@ async def handle_index(request: web.Request):
     if request.app.is_upload_folder_quota_reached:
         message = "Server reached quota! Contact administrator."
     if "is available here: " in message:
-        url = message[message.find("here: ") + len("here: "):]
-        message = message[: message.find("here: ")+len("here: ")]
-        message += f"<a href=\"{url}\">"
+        url = message[message.find("here: ") + len("here: ") :]
+        message = message[: message.find("here: ") + len("here: ")]
+        message += f'<a href="{url}">'
         message += f"{url}</a>"
     if message:
         message += "<br /><br />"