diff --git a/mysite/requirements.txt b/mysite/requirements.txt
index 01fc2d8..4962814 100644
--- a/mysite/requirements.txt
+++ b/mysite/requirements.txt
@@ -60,7 +60,7 @@ incremental==17.5.0
 jdcal==1.4
 jmespath==0.9.3
 jsonschema==2.6.0
-lxml==4.2.3
+lxml==4.9.1
 Markdown==2.6.11
 matplotlib==2.1.2
 mock==2.0.0