diff --git a/requirements.txt b/requirements.txt
index 1b13404..0f9dbb2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ jsonpickle==0.9.4
 kombu==3.0.35
 lazy-object-proxy==1.2.2
 libsass==0.11.1
-lxml==4.6.5
+lxml==4.9.1
 markerlib==0.6.0
 mccabe==0.6.1
 networkx==1.11