diff --git a/setup.py b/setup.py
index 6cb08e43e6..2f3831a438 100644
--- a/setup.py
+++ b/setup.py
@@ -78,7 +78,7 @@
         "freezegun==0.3.11",
     ],
     extras_require={
-        ':python_version=="2.7"': [
+        ':python_version<"3.3"': [
             'ipaddress',
         ],
     },