diff --git a/iron_condor.py b/iron_condor.py
index 5fc9f01..3fa490f 100644
--- a/iron_condor.py
+++ b/iron_condor.py
@@ -86,7 +86,7 @@ def enter_iron_condor(entry_time: datetime):
     try:
         _enter_iron_condor(entry_time)
     except Exception as e:
-        logging.error("Error: %s", traceback.format_exc())
+        logging.error('Error: %s', traceback.format_exc())
 
 def _enter_iron_condor(entry_time: datetime):
     ibkr_host = getenv('IBKR_HOST')