diff --git a/jupyter_events/logger.py b/jupyter_events/logger.py
index d002d0c..d25ccc0 100644
--- a/jupyter_events/logger.py
+++ b/jupyter_events/logger.py
@@ -12,6 +12,7 @@
 from datetime import datetime, timezone
 
 from jsonschema import ValidationError
+
 try:
     from pythonjsonlogger.json import JsonFormatter
 except ImportError: