diff --git a/requirements.txt b/requirements.txt
index 0a51f1b..e2e9856 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ itsdangerous==1.1.0
 Jinja2==2.10.3
 keyring==10.6.0
 keyrings.alt==3.0
-lxml==4.2.1
+lxml==4.9.1
 MarkupSafe==1.1.1
 pbr==5.4.3
 psycopg2==2.8.4