diff --git a/requirements.txt b/requirements.txt
index b29dbcc..4b4fb9b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -54,7 +54,7 @@ jupyter-console==5.2.0
 jupyter-core==4.3.0
 Keras==2.0.8
 llvmlite==0.20.0
-lxml==4.1.0
+lxml==4.9.1
 Markdown==2.6.9
 MarkupSafe==1.0
 matplotlib==2.1.0