diff --git a/barker/barker/models/voucher.py b/barker/barker/models/voucher.py
index e46b2b8..a568646 100644
--- a/barker/barker/models/voucher.py
+++ b/barker/barker/models/voucher.py
@@ -52,7 +52,7 @@ class Voucher(Base):
         backref="voucher",
         cascade="delete, delete-orphan",
         cascade_backrefs=False,
-        order_by=Kot.date,
+        order_by=Kot.code,
     )
     settlements = relationship(
         "Settlement",