diff --git a/pusher/pusher_client.py b/pusher/pusher_client.py
index 73f55c5..8f57c15 100644
--- a/pusher/pusher_client.py
+++ b/pusher/pusher_client.py
@@ -6,7 +6,12 @@
     absolute_import,
     division)
 
-import collections
+import sys
+# Abstract Base Classes were moved into collections.abc in Python 3.3
+if sys.version_info >= (3,3):
+    import collections.abc as collections
+else:
+    import collections
 import hashlib
 import os
 import re