diff --git a/flaschengeist/plugins/pricelist/models.py b/flaschengeist/plugins/pricelist/models.py
index d392168..99ef37c 100644
--- a/flaschengeist/plugins/pricelist/models.py
+++ b/flaschengeist/plugins/pricelist/models.py
@@ -139,7 +139,7 @@ class Drink(db.Model, ModelSerializeMixin):
     cost_per_package: Optional[float] = db.Column(db.Numeric(precision=5, scale=3, asdecimal=False))
 
     uuid: str = db.Column(db.String(36))
-    receipt: Optional[str] = db.Column(db.String)
+    receipt: Optional[list[str]] = db.Column(db.PickleType(protocol=4))
 
     _type_id = db.Column("type_id", db.Integer, db.ForeignKey("drink_type.id"))