diff --git a/requirements.txt b/requirements.txt
index 6ccc8bb1..0516fe6c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ idna==3.3
 importlib-metadata==4.8.2
 jmespath==0.10.0
 kombu==5.2.2
-lxml==4.6.4
+lxml==4.9.1
 Markdown==3.3.6
 outcome==1.1.0
 packaging==21.3