diff --git a/requirements.txt b/requirements.txt
index 84ee391..e546885 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,7 @@
 pbr>=2.0 # Apache-2.0
 neutron-lib>=1.9.0 # Apache-2.0
 oslo.config!=4.3.0,!=4.4.0,>=4.0.0 # Apache-2.0
+ipaddress>=1.0.16;python_version<'3.3' # PSF
 netaddr!=0.7.16,>=0.7.13 # BSD
 oslo.log>=3.22.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=1.10.0 # Apache-2.0