diff --git a/requirements.txt b/requirements.txt
index 2286a25..e95527a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ Jinja2==3.1.1
 jmespath==1.0.0
 kiwisolver==1.3.2
 logzero==1.7.0
-lxml==4.8.0
+lxml==4.9.1
 Markdown==3.3.6
 MarkupSafe==2.1.1
 matplotlib==3.5.1