diff --git a/test-requirements.txt b/test-requirements.txt
index bf2ffb9147..b32ca05967 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -11,7 +11,7 @@ oslotest>=1.10.0 # Apache-2.0
 reno>=1.8.0 # Apache2
 requests>=2.10.0 # Apache-2.0
 requests-mock>=1.1 # Apache-2.0
-sphinx!=1.3b1,<1.3,>=1.2.1 # BSD
+sphinx!=1.3b1,<1.4,>=1.2.1 # BSD
 stevedore>=1.16.0 # Apache-2.0
 os-client-config!=1.19.0,!=1.19.1,!=1.20.0,!=1.20.1,!=1.21.0,>=1.13.1 # Apache-2.0
 os-testr>=0.7.0 # Apache-2.0