diff --git a/documentation/sphinx/requirements.txt b/documentation/sphinx/requirements.txt
index 46b6da8b01..ea7a1c7b58 100644
--- a/documentation/sphinx/requirements.txt
+++ b/documentation/sphinx/requirements.txt
@@ -2,4 +2,5 @@
 setuptools>=20.10.0
 sphinx==1.5.6
 sphinx-bootstrap-theme==0.4.8
+docutils==0.16
 pygments-style-solarized