diff --git a/ci/requirements_dev.txt b/ci/requirements_dev.txt
index 82f8de277c57b..a474658fa2922 100644
--- a/ci/requirements_dev.txt
+++ b/ci/requirements_dev.txt
@@ -7,4 +7,4 @@ pytest>=3.1
 python-dateutil>=2.5.0
 pytz
 setuptools>=3.3
-sphinx
+sphinx=1.5*