diff --git a/requirements.txt b/requirements.txt
index c2c6f9f..ba668f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ jupyter==1.0.0
 jupyter-client==4.2.2
 jupyter-console==5.0.0
 jupyter-core==4.1.0
-lxml==3.6.0
+lxml==4.6.2
 MarkupSafe==0.23
 matplotlib==1.5.1
 mistune==0.7.2