diff --git a/requirements.txt b/requirements.txt
index 3c27869c7e..df5d26b69a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,4 +13,4 @@ six>=1.9.0
 xattr>=0.4
 PyECLib>=1.3.1                          # BSD
 cryptography!=2.0,>=1.6                 # BSD/Apache-2.0
-ipaddress>=1.0.17;python_version<'3.3'          # PSF
+ipaddress>=1.0.16;python_version<'3.3'          # PSF