diff --git a/src/aleph/sdk/query/responses.py b/src/aleph/sdk/query/responses.py
index a00748e9..6c2ca653 100644
--- a/src/aleph/sdk/query/responses.py
+++ b/src/aleph/sdk/query/responses.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from decimal import Decimal
 from typing import Any, Dict, List, Optional, Union
 
 from aleph_message.models import (