diff --git a/src/requirements.txt b/src/requirements.txt
index 263049e..36d4755 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -30,7 +30,7 @@ itsdangerous==0.24
 Jinja2==2.9.5
 language-selector==0.1
 louis==2.6.4
-lxml==3.5.0
+lxml==4.9.1
 Mako==1.0.6
 MarkupSafe==1.0
 oauthlib==1.0.3