diff --git a/requirements-dev.txt b/requirements-dev.txt
index c1a9fd792..fa2a7e9db 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -9,7 +9,7 @@ selenium==3.141.0
 twine==3.4.1
 Pallets-Sphinx-Themes==2.0.0
 docutils==0.16
-Sphinx==3.5.4
+Sphinx==4.0.1
 sphinx-issues==1.2.0
 sphinx-jinja==1.1.1
 sphinx-tabs==3.0.0