diff --git a/requirements.txt b/requirements.txt
index 3086f53..077d044 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ jmespath==0.9.4
 joblib==0.13.2
 Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
-lxml==4.4.1
+lxml==4.9.1
 Markdown==3.1.1
 MarkupSafe==1.1.1
 marshmallow==3.0.0