diff --git a/requirements.txt b/requirements.txt
index 7d3b86c..e8f0d26 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ jupyter-console==6.0.0
 jupyter-core==4.4.0
 kiwisolver==1.0.1
 lazy-object-proxy==1.3.1
-lxml==4.3.1
+lxml==4.6.3
 MarkupSafe==1.1.0
 matplotlib==3.0.2
 mccabe==0.6.1