diff --git a/doc/requirements.txt b/doc/requirements.txt
index 3734ee1c..797c4177 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,4 +1,4 @@
-sphinx>=2.0.0,!=2.1.0,<7.2.0 # BSD
+sphinx>=2.0.0,!=2.1.0  # BSD
 openstackdocstheme>=2.2.1 # Apache-2.0
 
 # Release Notes documentation