diff --git a/requirements.txt b/requirements.txt
index 996ccf5..7be8009 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ idna==2.5
 isort==4.2.15
 itsdangerous==0.24
 Jinja2==2.9.6
-lxml==3.8.0
+lxml==4.9.1
 MarkupSafe==1.0
 mccabe==0.6.1
 multidict==3.1.3