diff --git a/demo/utils/checker.py b/demo/utils/checker.py
index 474e417..65c7a47 100644
--- a/demo/utils/checker.py
+++ b/demo/utils/checker.py
@@ -5,15 +5,22 @@ from flask import Request, abort
 from demo.httpsig import HttpSignature, SignedData
 from demo.actor import fetch_actor
 from app import logger
+from pprint import pformat
 
 
 def inbox_prechecker(
         request: Request,
 ) -> bool:
     """Inbox request prechecker"""
+    try:
+        json_payload = request.json
+    except json.JSONDecodeError:
+        abort(401, "no activity+json request!")
+
     headers = request.headers
     payload = request.data
-    logger.debug(f"new request {payload=}\n{headers=}")
+    logger.info(f"new request \n{pformat(json_payload)}\n{pformat({k: v for k, v in request.headers})}")
+
     try:
         parsed_signature = HttpSignature.parse_signature(
             headers["signature"]