diff --git a/galpy/actionAngle_src/actionAngle.py b/galpy/actionAngle_src/actionAngle.py
index <HASH>..<HASH> 100644
--- a/galpy/actionAngle_src/actionAngle.py
+++ b/galpy/actionAngle_src/actionAngle.py
@@ -1,4 +1,4 @@
-from future.utils import with_metaclass
+from six import with_metaclass
 import types
 import copy
 import math as m
Get with_metaclass from six, because already a dependency