diff --git a/requirements.txt b/requirements.txt
index d19fb81..4476cf8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,7 +52,7 @@ jupyter-console==5.0.0
 jupyter-core==4.2.1
 lazy-object-proxy==1.2.2
 locket==0.2.0
-lxml==3.7.2
+lxml==4.6.5
 MarkupSafe==0.23
 matplotlib==2.0.0
 mistune>=0.8.1