diff --git a/python-docker-py.spec b/python-docker-py.spec
index 5f451de..a998c3a 100644
--- a/python-docker-py.spec
+++ b/python-docker-py.spec
@@ -34,6 +34,7 @@ BuildRequires:  pytest >= 2.7.2
 BuildRequires:  python-coverage >= 3.7.1
 BuildRequires:  python-six >= 1.4.0
 BuildRequires:  python-websocket-client >= 0.32.0
+BuildRequires:  python-ipaddress >= 3.4.1
 
 %if 0%{?fedora} >= 22
 Requires:       python-requests >= 2.5.2