diff --git a/requirements/docs.txt b/requirements/docs.txt
index a126cd5db3..5a6057f8e8 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -1,4 +1,4 @@
-sphinx>=4.0
+sphinx>=4.0,<4.1
 recommonmark  # fails with badges
 m2r  # fails with multi-line text
 nbsphinx>=0.8