diff --git a/requirements.txt b/requirements.txt
index ecae8b8..05e5304 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ hyperframe==5.2.0
 idna==2.10
 itsdangerous==1.1.0
 Jinja2==2.11.3
-lxml==4.6.3
+lxml==4.9.1
 MarkupSafe==1.1.1
 mypy-extensions==0.4.3
 pathspec==0.8.1