diff --git a/setup.py b/setup.py
index 9537c8d4..b96e9eb9 100644
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,7 @@
         'isodate>=0.5.0',
         'lxml>=3.3.5',
         'xmlsec>=1.0.5',
-        'defusedxml==0.6.0'
+        'defusedxml>=0.6.0'
     ],
     dependency_links=['http://github.com/mehcode/python-xmlsec/tarball/master'],
     extras_require={