diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index eee3150..71f4c9b 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,14 @@
 Changelog
 =========
 
+Version 0.2.4
+-------------
+
+Bug fixes
+~~~~~~~~~
+
+- Do not call ``get_reusable_executor().shutdown()`` when tasks are run serially in ``run_parallel()``.
+
 Version 0.2.3
 -------------
 
diff --git a/src/blueetl_core/parallel.py b/src/blueetl_core/parallel.py
index 0d974d0..9232bef 100644
--- a/src/blueetl_core/parallel.py
+++ b/src/blueetl_core/parallel.py
@@ -117,7 +117,7 @@ def run_parallel(
             for i, task in enumerate(tasks)
         )
     finally:
-        if shutdown_executor and (not backend or backend == "loky"):
+        if shutdown_executor and (not backend or backend == "loky") and jobs != 1:
             # shutdown the pool of processes used by loky
             get_reusable_executor().shutdown(wait=True)