diff --git a/requirements.txt b/requirements.txt
index 94afd8d..fc508d2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ Keras-Preprocessing==1.0.5
 kiwisolver==1.1.0
 language-selector==0.1
 louis==2.6.4
-lxml==3.5.0
+lxml==4.9.1
 Mako==1.0.3
 Markdown==3.1.1
 MarkupSafe==0.23