diff --git a/rsopt/simulation.py b/rsopt/simulation.py
index dc71a6b..2e508c2 100644
--- a/rsopt/simulation.py
+++ b/rsopt/simulation.py
@@ -5,7 +5,7 @@
 import rsopt.conversion
 from libensemble import message_numbers
 from libensemble.executors.executor import Executor
-from collections import Iterable
+from collections.abc import Iterable
 
 # TODO: This should probably be in libe_tools right?