diff --git a/requirements.txt b/requirements.txt
index a1896f7..c80f738 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ itsdangerous==0.24
 jieba==0.38
 Jinja2==2.7.3
 jsmin==2.0.11
-lxml==3.4.0
+lxml==4.6.2
 macholib==1.5.1
 MarkupSafe==0.23
 matplotlib==1.3.1