diff --git a/requirements.txt b/requirements.txt
index 545ad4d..4709c8a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -94,7 +94,7 @@ lazr.restfulclient==0.14.2
 lazr.uri==1.0.3
 lockfile==0.12.2
 louis==3.12.0
-lxml==4.5.2
+lxml==4.6.3
 macaroonbakery==1.3.1
 Mako==1.1.0
 MarkupSafe==1.1.0