diff --git a/android2po/commands.py b/android2po/commands.py
index 8f79458..31e8dab 100644
--- a/android2po/commands.py
+++ b/android2po/commands.py
@@ -2,6 +2,7 @@
 
 import os
 import collections
+collections.Callable = collections.abc.Callable
 try:
     from cStringIO import StringIO as BytesIO
 except ImportError:  # pragma: no cover