diff --git a/sharex_server.py b/sharex_server.py
index 54bd82a..fda9d6f 100644
--- a/sharex_server.py
+++ b/sharex_server.py
@@ -47,7 +47,7 @@ def sizeof_fmt(num, suffix='B'):
 async def prepare(_, handler):
     async def prepare_handler(req):
         if 'acc' not in req.match_info:
-            return web.Response(text='internal server error', status=500)
+            return web.Response(text='bad request', status=400)
         return await handler(req, req.match_info["acc"], file_db[req.match_info["acc"]])
     return prepare_handler