diff --git a/slack_backup/client.py b/slack_backup/client.py
index c2aac99..8f530a3 100644
--- a/slack_backup/client.py
+++ b/slack_backup/client.py
@@ -3,6 +3,7 @@ Create backup for certain date for specified channel in slack
 """
 from datetime import datetime
 import getpass
+import json
 import logging
 import os
 
@@ -151,6 +152,8 @@ class Client(object):
             logging.info("Skipping message of type `%s'.", data['type'])
             return
 
+        logging.debug('Message data: %s', json.dumps(data))
+
         try:
             user = self.q(o.User).\
                 filter(o.User.slackid == data['user']).one()