diff --git a/requirements.txt b/requirements.txt
index 6c0ffaa..fea2e08 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,6 @@ anyjson==0.3.3
 billiard==3.3.0.22
 celery==3.1.20
 kombu==3.0.33
-lxml==3.5.0
+lxml==4.9.1
 pytz==2015.7
 requests==2.9.1