diff --git a/requirements-docs.txt b/requirements-docs.txt
index 48f3a6db..70395890 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -1,3 +1,4 @@
+Jinja2<3.1.0
 nbsphinx
 numpydoc>=0.7.0
 pydata-sphinx-theme; python_version>='3.6'