diff --git a/setup.cfg b/setup.cfg
index 9b67573..654c47d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,3 +1,7 @@
 [nosetests]
 verbosity=3
-with-doctest=1 
+with-doctest=1
+
+[bdist_wheel]
+# This flag says that the code is written to work on both Python 2 and Python 3.
+universal=1