diff --git a/setup.py b/setup.py
index 67ae653..4d3e7b1 100644
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@ setup(
         'Programming Language :: Python :: 3',
     ],
     provides=['ablog ({0:s})'.format(__version__)],
-    install_requires=['Werkzeug', 'Sphinx'>=1.6, 'alabaster', 'invoke', 'python-dateutil'],
+    install_requires=['Werkzeug', 'Sphinx>=1.6', 'alabaster', 'invoke', 'python-dateutil'],
     message_extractors={
         'ablog': [
             ('**.html', 'jinja2', None),