diff --git a/requirements.txt b/requirements.txt
index 788f117..4a31deb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ itsdangerous==0.24
 jieba==0.35
 jieba3k==0.35.1
 Jinja2==2.8
-lxml==4.2.1
+lxml==4.9.1
 Mako==1.0.6
 Markdown==2.6.6
 MarkupSafe==0.23