diff --git a/docs/requirements.txt b/docs/requirements.txt
index 359b7099b..9c51a79e4 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,6 +2,9 @@
 # used by Read The Docs to install python required 
 # modules with pip.
 
+# Workaround to fix the bug: https://github.com/readthedocs/readthedocs.org/issues/9038
+Jinja2<3.1 
+
 # Support Markdown
 #recommonmark