diff --git a/slixmpp/thirdparty/orderedset.py b/slixmpp/thirdparty/orderedset.py
index f6642db3..1abe9281 100644
--- a/slixmpp/thirdparty/orderedset.py
+++ b/slixmpp/thirdparty/orderedset.py
@@ -22,7 +22,7 @@
 
 import collections
 
-class OrderedSet(collections.MutableSet):
+class OrderedSet(collections.abc.MutableSet):
 
     def __init__(self, iterable=None):
         self.end = end = []