diff --git a/unittest2/compatibility.py b/unittest2/compatibility.py
index 9e5f1a5..473957c 100644
--- a/unittest2/compatibility.py
+++ b/unittest2/compatibility.py
@@ -1,4 +1,5 @@
 import collections
+import collections.abc
 import os
 import sys
 
@@ -140,7 +141,7 @@ except ImportError:
 ###  ChainMap (helper for configparser and string.Template)
 ########################################################################
 
-class ChainMap(collections.MutableMapping):
+class ChainMap(collections.abc.MutableMapping):
     ''' A ChainMap groups multiple dicts (or other mappings) together
     to create a single, updateable view.