diff --git a/libs/langchain/langchain/document_loaders/notiondb.py b/libs/langchain/langchain/document_loaders/notiondb.py
index bd7a81c896..d7728efcc8 100644
--- a/libs/langchain/langchain/document_loaders/notiondb.py
+++ b/libs/langchain/langchain/document_loaders/notiondb.py
@@ -121,11 +121,15 @@ class NotionDBLoader(BaseLoader):
                     else []
                 )
             elif prop_type == "date":
-                value = prop_data["date"]
-            elif prop_type == "created_time":
-                value = prop_data["created_time"]
+                value = prop_data["date"] if prop_data["date"] else None
             elif prop_type == "last_edited_time":
-                value = prop_data["last_edited_time"]
+                value = (
+                    prop_data["last_edited_time"]
+                    if prop_data["last_edited_time"]
+                    else None
+                )
+            elif prop_type == "created_time":
+                value = prop_data["created_time"] if prop_data["created_time"] else None
             else:
                 value = None