diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -25,6 +25,7 @@ long_description = read('README.rst')
 # Core dependencies
 install_requires = [
     'future',
+    'docutils==0.13.1',  # currently pinned in conjunction with Sphinx
     'Sphinx>=1.5.0,<1.6.0',
     'PyYAML',
     'sphinx-prompt',
Pin docutils==<I>

This is necessary because the Sphinx>=<I>,<<I> constraint
effectively requires docutils <I>, but this isn't rigorously enforced
by Sphinx's own requirements. This pin will need to change when we
upgrade to the Sphinx <I> series.