diff --git a/docs/requirements.txt b/docs/requirements.txt
index 560d3acd2..3b4363921 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,5 @@
 sphinx==3.5.4
+jinja2<3.1
 recommonmark==0.6.0
 furo==2021.4.11b34
 git+https://github.com/Oneflow-Inc/libai.git