diff --git a/requirements.txt b/requirements.txt
index c7af86a..680c817 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -98,7 +98,7 @@ Keras-Preprocessing==1.0.9
 lazy-object-proxy==1.3.1
 llvmlite==0.21.0
 locket==0.2.0
-lxml==4.1.1
+lxml==4.9.1
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==2.1.2