diff --git a/server.py b/server.py
index cfbda71..69e6fda 100644
--- a/server.py
+++ b/server.py
@@ -1129,8 +1129,8 @@ def list_assets(
 def search_by_machine_id(machine_id: str = Query(...)):
     conn = get_db()
     row = conn.execute(
-        "SELECT * FROM assets WHERE machine_id = ? OR connect_id = ?",
-        (machine_id, machine_id),
+        "SELECT * FROM assets WHERE machine_id = ? OR connect_id = ? OR serial_number = ?",
+        (machine_id, machine_id, machine_id),
     ).fetchone()
     conn.close()
     if row is None: