diff --git a/requirements.txt b/requirements.txt
index d1a742a..2526f1f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ cssselect==0.9.2
 DateTime==4.1.1
 docopt==0.6.2
 elasticsearch==2.4.0
-lxml==3.6.4
+lxml==4.9.1
 mongoengine==0.10.6
 oauthlib==2.0.0
 pathtools==0.1.2