diff --git a/Documentation/sphinx/requirements.txt b/Documentation/sphinx/requirements.txt
index 9a35f50798a6..2c573541ab71 100644
--- a/Documentation/sphinx/requirements.txt
+++ b/Documentation/sphinx/requirements.txt
@@ -1,2 +1,4 @@
+# jinja2>=3.1 is not compatible with Sphinx<4.0
+jinja2<3.1
 sphinx_rtd_theme
 Sphinx==2.4.4