diff --git a/InvenTree/stock/serializers.py b/InvenTree/stock/serializers.py
index 91d9e03016..bde9b2b25b 100644
--- a/InvenTree/stock/serializers.py
+++ b/InvenTree/stock/serializers.py
@@ -104,12 +104,14 @@ class StockItemSerializer(InvenTreeModelSerializer):
     location_detail = LocationBriefSerializer(source='location', many=False, read_only=True)
     supplier_part_detail = SupplierPartSerializer(source='supplier_part', many=False, read_only=True)
 
-    tracking_items = serializers.IntegerField(source='tracking_info_count')
+    tracking_items = serializers.IntegerField(source='tracking_info_count', read_only=True, required=False)
 
     quantity = serializers.FloatField()
-    allocated = serializers.FloatField(source='allocation_count')
+    allocated = serializers.FloatField(source='allocation_count', required=False)
 
-    required_tests = serializers.IntegerField(source='required_test_count', read_only=True)
+    serial = serializers.IntegerField(required=False)
+
+    required_tests = serializers.IntegerField(source='required_test_count', read_only=True, required=False)
 
     def __init__(self, *args, **kwargs):