diff --git a/requirements.txt b/requirements.txt
index 5beaa45..54a8562 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 backports.ssl-match-hostname==3.4.0.2
 certifi==14.5.14
 elasticsearch==1.3.0
-lxml==3.4.1
+lxml==4.9.1
 MarkupSafe==0.23
 pyelasticsearch==1.0
 requests==2.5.1