diff --git a/requirements-doc.txt b/requirements-doc.txt
index b6e249a0..c6edbf13 100644
--- a/requirements-doc.txt
+++ b/requirements-doc.txt
@@ -1,5 +1,9 @@
 # TODO: unpin 3.5.0 when this bug is fixed: https://github.com/sphinx-doc/sphinx/issues/8885
 sphinx<3.5.0
+
+# TODO: unpin jinja2 after sphinx update to 4+
+jinja2<3.1
+
 -e git+https://github.com/rmk135/sphinxcontrib-disqus.git#egg=sphinxcontrib-disqus
 
 -r requirements-ext.txt