diff --git a/markitect/database.py b/markitect/database.py
index 07abe25b..e0546c86 100644
--- a/markitect/database.py
+++ b/markitect/database.py
@@ -85,7 +85,7 @@ class DatabaseManager:
             cursor.execute('''
                 INSERT INTO markdown_files (filename, front_matter, content, created_at)
                 VALUES (?, ?, ?, ?)
-            ''', (filename, front_matter_json, markdown_content, datetime.now()))
+            ''', (filename, front_matter_json, markdown_content, datetime.now().isoformat()))
 
             record_id = cursor.lastrowid
             conn.commit()