diff --git a/requirements.txt b/requirements.txt
index 356df1a..b68bcac 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ idna==2.6
 itsdangerous==0.24
 Jinja2==2.9.6
 kombu==4.1.0
-lxml==4.0.0
+lxml==4.9.1
 MarkupSafe==1.0
 pytz==2017.2
 redis==2.10.6