diff --git a/setup.py b/setup.py
index 45f19ea7a7d..6efec4e6125 100755
--- a/setup.py
+++ b/setup.py
@@ -126,7 +126,6 @@ setuptools.setup(
           'vobject',
           'werkzeug',
           'xlwt',
-          'zsi', # optional
       ],
       extras_require = {
           'SSL' : ['pyopenssl'],