Require ipaddress on Python < 3.5

Signed-off-by: Felix Yan <felixonmars@archlinux.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 2be705d..57afd8b 100644
--- a/setup.py
+++ b/setup.py
@@ -14,6 +14,7 @@ requirements = [
 
 extras_require = {
     ':python_version < "3.5"': 'backports.ssl_match_hostname >= 3.5',
+    ':python_version < "3.5"': 'ipaddress',
 }
 
 exec(open('docker/version.py').read())