diff --git a/worker_voucher/schema.py b/worker_voucher/schema.py
index e098a23..88fef18 100644
--- a/worker_voucher/schema.py
+++ b/worker_voucher/schema.py
@@ -45,6 +45,7 @@ def resolve_previous_workers(self, info, economic_unit_code=None, **kwargs):
         filters = append_validity_filter(**kwargs)
 
         query = Insuree.get_queryset(None, info.context.user).filter(
+            validity_to__isnull=True,
             workervoucher__is_deleted=False,
             workervoucher__policyholder__is_deleted=False,
             workervoucher__policyholder__code=economic_unit_code