diff --git a/requirements.txt b/requirements.txt
index 569d870..4d2ee1e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -67,7 +67,7 @@ lazr.uri==1.0.3
 lazy-object-proxy==1.4.3
 libroadrunner==1.5.4
 louis==3.5.0
-lxml==4.4.2
+lxml==4.9.1
 macaroonbakery==1.1.3
 macholib==1.11
 Markdown==3.1.1