diff --git a/core/elasticsearch/documents.py b/core/elasticsearch/documents.py
index d373e81b..fcdd062e 100644
--- a/core/elasticsearch/documents.py
+++ b/core/elasticsearch/documents.py
@@ -55,7 +55,6 @@ class ProductDocument(_BaseDoc):
     rating = fields.FloatField(attr="rating")
     brand_priority = fields.IntegerField(
         attr="brand.priority",
-        null=True,
         index=True,
         fields={"raw": fields.KeywordField()},
     )