diff --git a/requirements.txt b/requirements.txt
index bf88a56..cf1032b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ joblib==0.14.1
 Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
 lazy-object-proxy==1.4.3
-lxml==4.6.3
+lxml==4.9.1
 Mako==1.1.2
 Markdown==3.2.1
 MarkupSafe==1.1.1