diff --git a/requirements.txt b/requirements.txt
index ca5d5c86be..913fd8fd51 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ six==1.12.0
 sphinx-argparse==0.2.5
 sphinx-autodoc-annotation==1.0-1
 sphinx-rtd-theme==0.4.2
-sphinx==1.8.3
+sphinx==1.8.4
 texttable==1.6.0
 tornado==5.1.1
 tox==3.7.0