diff --git a/requirements.txt b/requirements.txt
index 62c3f92..868e89f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,6 @@
 
 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