diff --git a/ckan/requirements-freeze.txt b/ckan/requirements-freeze.txt
index d64f13d..85632e2 100644
--- a/ckan/requirements-freeze.txt
+++ b/ckan/requirements-freeze.txt
@@ -45,7 +45,7 @@ itsdangerous==1.1.0
 jedi==0.18.0
 Jinja2==2.10.1
 jinja2-time==0.2.0
-lxml==4.6.3
+lxml==4.9.1
 Mako==1.1.5
 Markdown==2.6.7
 MarkupSafe==1.1.1