diff --git a/requirements.txt b/requirements.txt
index 4d615e0..0c54f36 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -102,7 +102,7 @@ kombu==3.0.37
 lazy-object-proxy==1.3.1
 librabbitmq==1.5.1
 lockfile==0.12.2
-lxml==3.5.0
+lxml==4.6.5
 Mako==1.0.7
 Markdown==2.6.11
 MarkupSafe==0.23