diff --git a/server.py b/server.py
index fe69380..2136be4 100644
--- a/server.py
+++ b/server.py
@@ -962,9 +962,9 @@ def list_assets(
         conditions.append("assigned_to = ?")
         params.append(assigned_to)
     if q:
-        conditions.append("(name LIKE ? OR machine_id LIKE ? OR description LIKE ?)")
+        conditions.append("(name LIKE ? OR machine_id LIKE ? OR serial_number LIKE ? OR description LIKE ?)")
         like = f"%{q}%"
-        params.extend([like, like, like])
+        params.extend([like, like, like, like])
 
     where = " AND ".join(conditions)
     sql = "SELECT * FROM assets"