diff --git a/requirements.txt b/requirements.txt
index 2f774a5..768e25c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ gunicorn==19.9.0
 idna==2.7
 itsdangerous==0.24
 Jinja2==2.10
-lxml==4.2.5
+lxml==4.9.1
 MarkupSafe==1.0
 more-itertools==4.3.0
 pluggy==0.7.1