diff --git a/requirements.txt b/requirements.txt
index f0f87523f..99362d13c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ elasticsearch==5.4.0  # Apache 2.0
 furl==0.4.95  # None
 gevent==1.2.2  # MIT
 jsonschema==2.5.1  # MIT
-lxml==3.6.0  # BSD
+lxml==4.6.3  # BSD
 kombu==4.1.0  # BSD 3 Clause
 markdown==2.6.8  # BSD
 nameparser==1.0.1  # LGPL