diff --git a/main.py b/main.py
index 67eaa1c..283173f 100644
--- a/main.py
+++ b/main.py
@@ -24,7 +24,8 @@ async def handler(request: aiohttp.web.Request):
             return aiohttp.web.Response(status=200)
     except Exception as e:
         traceback.print_exc()
-        return aiohttp.web.Response(status=400)
+        resp = {"error": e.args[0]}
+        return aiohttp.web.json_response(resp)
 
 
 @routes.post('/api/{method}')