diff --git a/requirements.txt b/requirements.txt
index 57a78d8..212d436 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ jupyter==1.0.0
 jupyter-client==5.2.1
 jupyter-console==5.2.0
 jupyter-core==4.4.0
-lxml==4.1.1
+lxml==4.6.5
 MarkupSafe==1.0
 matplotlib==2.1.0
 mistune==0.8.3