diff --git a/portfolio/requirements.txt b/portfolio/requirements.txt
index 1fa1012..f91a2a5 100644
--- a/portfolio/requirements.txt
+++ b/portfolio/requirements.txt
@@ -36,7 +36,7 @@ launchpadlib==1.10.2
 lazr.restfulclient==0.13.3
 lazr.uri==1.0.3
 lockfile==0.8
-lxml==3.3.3
+lxml==4.9.1
 mercurial==2.8.2
 netifaces==0.8
 numpy==1.8.2