diff --git a/test-requirements.txt b/test-requirements.txt
index b64eb9d73..cad5bd927 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -16,7 +16,7 @@ python-subunit>=0.0.18
 
 readme_renderer[md]
 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,<=4.5.0;python_version>='3.4' # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2,<=5.0.0;python_version>='3.4' # BSD
 oslotest>=1.10.0 # Apache-2.0
 openstackdocstheme>=1.19.0 # Apache-2.0
 sphinx_rtd_theme