diff --git a/docs/requirements.txt b/docs/requirements.txt
index 12c1b5b..88e6733 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,4 +2,4 @@
 #
 # SPDX-License-Identifier: Unlicense
 
-sphinx>4
+sphinx>=4.0.0