diff --git a/scouter/activities/mongodb.py b/scouter/activities/mongodb.py
index 2bf2813..a02db81 100644
--- a/scouter/activities/mongodb.py
+++ b/scouter/activities/mongodb.py
@@ -113,7 +113,8 @@ class MongoDB(BaseActivity):
             data = clear_mongo_id(data)
 
             for item in data:
-                item['inserted_at'] = item['inserted_at'].isoformat()
+                item['inserted_at'] = item['inserted_at'].strftime(
+                    "%Y-%m-%d %H:%M:%S.%f")
 
             self.info(
                 f"Loaded {len(data)} documents from MongoDB",