diff --git a/test-requirements.txt b/test-requirements.txt
index ce2834b4f..6572f62c4 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,7 +9,7 @@ coverage!=4.4,>=4.0 # Apache-2.0
 mock>=2.0.0 # BSD
 fixtures>=3.0.0 # Apache-2.0/BSD
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
-sphinx!=1.6.6,>=1.6.2 # BSD
+sphinx!=1.6.6,<1.7.0,>=1.6.2 # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0