diff --git a/lower-constraints.txt b/lower-constraints.txt
index 6f162093..1702818d 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -83,7 +83,7 @@ semantic-version==2.3.1
 simplejson==3.5.1
 six==1.10.0
 snowballstemmer==1.2.1
-Sphinx==1.6.5
+Sphinx==1.6.2
 sphinxcontrib-websupport==1.0.1
 stevedore==1.20.0
 tempest==17.1.0