diff --git a/requirements.txt b/requirements.txt
index 95aa8c9..910f446 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ Keras-Applications==1.0.4
 Keras-Preprocessing==1.0.2
 kiwisolver==1.0.1
 lesscpy==0.13.0
-lxml==4.2.5
+lxml==4.9.1
 Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.2.3