diff --git a/requirements.txt b/requirements.txt
index 30d48610d..a99abde65 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,8 @@
 sphinx
 rst2pdf
 pillow
-sphinx-rtd-theme
+sphinx-rtd-theme==1.2.0rc2
 sphinxcontrib-phpdomain
+
+# https://github.com/readthedocs/readthedocs.org/issues/9037#issuecomment-1077818554
+jinja2<3.1.0