diff --git a/doc/requirements.txt b/doc/requirements.txt
index 76929207990..a5856316a86 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -34,3 +34,4 @@ wget
 nbconvert==5.6.1
 orjson
 dash-bio
+jinja2<3.1