diff --git a/.ci_pip_reqs.txt b/.ci_pip_reqs.txt
index 6e6c43d9..53cabd55 100644
--- a/.ci_pip_reqs.txt
+++ b/.ci_pip_reqs.txt
@@ -7,3 +7,5 @@ sphinxcontrib-napoleon
 sphinx-markdown-tables
 sphinx-rtd-theme
 recommonmark
+# https://github.com/spatialaudio/nbsphinx/issues/641
+Jinja2==3.0.3
diff --git a/setup.py b/setup.py
index 69812260..3d7194fc 100644
--- a/setup.py
+++ b/setup.py
@@ -82,6 +82,8 @@ def absolute_links(txt):
               'nbsphinx>=0.8.2',
               'm2r>=0.2.1',
               'ipython>=7.21.0',
+              # https://github.com/spatialaudio/nbsphinx/issues/641
+              'Jinja2==3.0.3',
           ]
       }
       )