diff --git a/requirements.txt b/requirements.txt
index b876c60c..10cadcfe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
-sphinx>=2.0.0,!=2.1.0 # BSD
+sphinx>=4.2 # BSD
 openstackdocstheme>=2.2.1 # Apache-2.0
 whereto>=0.3.0 # Apache-2.0
 pyenchant # GNU LGPL