diff --git a/docs/requirements.txt b/docs/requirements.txt
index b15c38a4..f21bf9de 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,2 @@
-sphinx==3.5.4
+sphinx==4.0.2
 furo==2021.4.11b34