diff --git a/test-requirements.txt b/test-requirements.txt
index e552a1d7..df96fd70 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -20,6 +20,6 @@ os-testr>=0.7.0 # Apache-2.0
 bandit>=1.1.0 # Apache-2.0
 
 # this is required for the docs build jobs
-sphinx!=1.3b1,<1.3,>=1.2.1 # BSD
+sphinx!=1.3b1,<1.4,>=1.2.1 # BSD
 oslosphinx>=4.7.0 # Apache-2.0
 reno>=1.8.0 # Apache2