diff --git a/apps/wpmw/serializers.py b/apps/wpmw/serializers.py
index 482036a2..421d79d2 100644
--- a/apps/wpmw/serializers.py
+++ b/apps/wpmw/serializers.py
@@ -13,6 +13,8 @@ class WprDefectSerializer(CustomModelSerializer):
 
 
 class WprSerializer(CustomModelSerializer):
+    wm_batch = serializers.CharField(source="wm.batch", read_only=True)
+    mb_batch = serializers.CharField(source="mb.batch", read_only=True)
     material_name = serializers.StringRelatedField(
         source='material', read_only=True) 
     wprdefect = WprDefectSerializer(many=True, read_only=True)