diff --git a/scouter/activities/mongodb.py b/scouter/activities/mongodb.py
index 81370db..a85ea71 100644
--- a/scouter/activities/mongodb.py
+++ b/scouter/activities/mongodb.py
@@ -4,7 +4,7 @@ with workflow.unsafe.imports_passed_through():
     from typing import Any
     import traceback
     from logging import Logger
-    import datetime
+    from datetime import datetime
     from pymongo import MongoClient
     from sientia_do.notifications.handlers import NotificationHandler
     from sientia_do.notifications.models import NotificationLevel
@@ -97,6 +97,9 @@ class MongoDB(BaseActivity):
 
             data = clear_mongo_id(data)
 
+            for item in data:
+                item['inserted_at'] = item['inserted_at'].isoformat()
+
             self.info(
                 f"Loaded {len(data)} documents from MongoDB",
                 metadata=metadata