diff --git a/ereuse_devicehub/resources/lot/schemas.py b/ereuse_devicehub/resources/lot/schemas.py
index 5dcf9f63..5604cc2e 100644
--- a/ereuse_devicehub/resources/lot/schemas.py
+++ b/ereuse_devicehub/resources/lot/schemas.py
@@ -28,5 +28,5 @@ class Lot(Thing):
     transfer_state = EnumField(TransferState, description=m.Lot.transfer_state.comment)
     receiver_address = SanitizedStr(validate=f.validate.Length(max=42))
     deliverynote = NestedOn(s_deliverynote.Deliverynote, dump_only=True)
-    documents = NestedOn(s_document.TradeDocument, dump_only=True)
+    documents = NestedOn('TradeDocument', many=True, dump_only=True)
     trade = NestedOn(s_action.Trade, dump_only=True)
diff --git a/ereuse_devicehub/resources/tradedocument/schemas.py b/ereuse_devicehub/resources/tradedocument/schemas.py
index e63610ec..8e96e54a 100644
--- a/ereuse_devicehub/resources/tradedocument/schemas.py
+++ b/ereuse_devicehub/resources/tradedocument/schemas.py
@@ -25,4 +25,3 @@ class TradeDocument(Thing):
                              description=m.TradeDocument.file_hash.comment)
     url = URL(description=m.TradeDocument.url.comment)
     lot = NestedOn('Lot', only_query='id', description=m.TradeDocument.lot.__doc__)
-    # lot = NestedOn(s_lot.Lot, only_query='id', description=m.TradeDocument.lot.__doc__)