diff --git a/cytotable/convert.py b/cytotable/convert.py
index 72b93439..2b345e45 100644
--- a/cytotable/convert.py
+++ b/cytotable/convert.py
@@ -1653,4 +1653,7 @@ def convert(  # pylint: disable=too-many-arguments,too-many-locals
             **kwargs,
         )
 
+    # cleanup Parsl executor and related
+    parsl.dfk().cleanup()
+
     return output