diff --git a/requirements.txt b/requirements.txt
index 5b3aadd..5caff4f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@
 pyyaml
 six
 enum34
+ipaddress
diff --git a/setup.py b/setup.py
index 0e33e64..19b079c 100644
--- a/setup.py
+++ b/setup.py
@@ -42,7 +42,7 @@
     url = URL,
     packages = find_packages(exclude=['*tests']), #FIXME validate this
     entry_points = { 'console_scripts': console_scripts },
-    install_requires = ['pyparsing', 'pyyaml', 'six', 'enum34'], #FIXME pygit2 (require libffi-dev, libgit2-dev 0.26.x )
+    install_requires = ['pyparsing', 'pyyaml', 'six', 'enum34', 'ipaddress'], #FIXME pygit2 (require libffi-dev, libgit2-dev 0.26.x )
 
     classifiers=[
         'Development Status :: 4 - Beta',