diff --git a/requirements.txt b/requirements.txt
index 6c3126cf4..a3df6f260 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ gsconfig==1.0.6
 gsimporter==1.0.0
 httplib2==0.9.2
 kombu==3.0.35
-lxml==3.6.4
+lxml==4.9.1
 mccabe==0.5.2
 oauthlib==2.0.1
 pep8==1.6.2