diff --git a/requirements.txt b/requirements.txt
index 40bd61d..46d89ca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ jieba3k==0.35.1
 Jinja2==2.10.1
 jmespath==0.9.3
 lazy-object-proxy==1.3.1
-lxml==4.3.2
+lxml==4.9.1
 MarkupSafe==1.0
 mccabe==0.6.1
 more-itertools==5.0.0