diff --git a/requirements-docs.txt b/requirements-docs.txt
index 282c2be09..c630b63b0 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -4,5 +4,5 @@ jinja2<3.1
 
 
 docutils>=0.10,<0.16
-Sphinx==1.2.3
+Sphinx==3.3.0
 -e .