diff --git a/setup.py b/setup.py
index 2b875536d..df262ef1b 100755
--- a/setup.py
+++ b/setup.py
@@ -52,7 +52,7 @@ testing_extras = [
 
 # Documentation dependencies
 documentation_extras = [
-    'Sphinx>=1.3.1',
+    'Sphinx>=1.3.1,<2.0',
     'sphinx-autobuild>=0.5.2',
     'sphinx_rtd_theme>=0.1.8',
     'sphinxcontrib-spelling==2.1.1',