diff --git a/test-requirements.txt b/test-requirements.txt
index d4b069e..8a5468e 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,7 +9,7 @@ ordereddict # MIT
 os-client-config!=1.19.0,!=1.19.1,!=1.20.0,!=1.20.1,!=1.21.0,>=1.13.1 # Apache-2.0
 oslosphinx>=4.7.0 # Apache-2.0
 reno>=1.8.0 # Apache2
-sphinx!=1.3b1,<1.3,>=1.2.1 # BSD
+sphinx!=1.3b1,<1.4,>=1.2.1 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
 testscenarios>=0.4 # Apache-2.0/BSD