diff --git a/arekit/contrib/utils/serializer.py b/arekit/contrib/utils/serializer.py
index 8c788ce0..4f6f08e8 100644
--- a/arekit/contrib/utils/serializer.py
+++ b/arekit/contrib/utils/serializer.py
@@ -56,5 +56,5 @@ def serialize(pipeline, doc_ids_iter, keep_labels, do_balance, sample_rows_provi
             samples_repo.balance()
 
         # Write repositories
-        samples_repo.write(writer=samples_writer, target=samples_target())
-        opinions_repo.write(writer=opinions_writer, target=opinions_target())
+        samples_repo.write(writer=samples_writer, target=samples_target)
+        opinions_repo.write(writer=opinions_writer, target=opinions_target)