diff --git a/requirements.txt b/requirements.txt
index 94679ed..703b507 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ jupyter-client==5.3.3
 jupyter-console==6.0.0
 jupyter-core==4.5.0
 kiwisolver==1.1.0
-lxml==4.4.1
+lxml==4.6.3
 MarkupSafe==1.1.1
 matplotlib==3.1.1
 mistune==0.8.4