diff --git a/eos/modifiedAttributeDict.py b/eos/modifiedAttributeDict.py
index 0a9eda8a4..c369d4589 100644
--- a/eos/modifiedAttributeDict.py
+++ b/eos/modifiedAttributeDict.py
@@ -18,7 +18,7 @@
 # ===============================================================================
 
 
-from collections import MutableMapping
+from collections.abc import MutableMapping
 from copy import copy
 from math import exp