diff --git a/docs/requirements.txt b/docs/requirements.txt
index 12f2d494a08ef..1e4326e963b52 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -161,9 +161,9 @@ sphinx-tabs==2.1.0 \
     --hash=sha256:0b5a8dd71d87197a01eef3b9d1e1a70513f4dd45e8af7783d1ab74c3fb2cbc6c \
     --hash=sha256:9d8db61afe9499aa84b33bc1c0d891f8a0df88ae513739f5babde15430c1fdaf
     # via -r docs/requirements.txt
-sphinx==3.5.4 \
-    --hash=sha256:19010b7b9fa0dc7756a6e105b2aacd3a80f798af3c25c273be64d7beeb482cb1 \
-    --hash=sha256:2320d4e994a191f4b4be27da514e46b3d6b420f2ff895d064f52415d342461e8
+sphinx==4.0.0 \
+    --hash=sha256:904e02cd0f84bed5d3748358c228ae3df3ad725b9e6cdc2166e17b309ed2e1fa \
+    --hash=sha256:b246ebd74f5fb966d7e90086bbda5ed74ee4d30b4c3cbefddc1fb5210aa317c7
     # via
     #   -r docs/requirements.txt
     #   sphinx-copybutton