diff --git a/hb_server/apps/mtm/serializers.py b/hb_server/apps/mtm/serializers.py
index e6ab035..3e34690 100644
--- a/hb_server/apps/mtm/serializers.py
+++ b/hb_server/apps/mtm/serializers.py
@@ -6,7 +6,6 @@ from apps.system.serializers import FileSimpleSerializer, OrganizationSimpleSeri
 
 
 class MaterialSerializer(serializers.ModelSerializer):
-    processes = serializers.ListField(child=serializers.IntegerField(min_value=1))
     class Meta:
         model = Material
         fields = '__all__'