diff --git a/test-requirements.txt b/test-requirements.txt
index 68a8676be6..c19bd2dc84 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,7 +6,8 @@ openstackdocstheme>=1.18.1 # Apache-2.0
 PyYAML>=3.12 # MIT
 Jinja2>=2.10 # BSD License (3 clause)
 six>=1.10.0 # MIT
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7'  # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4'  # BSD
 reno>=2.5.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD