diff --git a/requirements.txt b/requirements.txt
index a6e8268..1134bdb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ Keras-Preprocessing==1.0.2
 kiwisolver==1.0.1
 lazy-object-proxy==1.3.1
 lockfile==0.12.2
-lxml==4.2.5
+lxml==4.9.1
 Mako==1.0.7
 MarkupSafe==1.0
 matplotlib==2.2.2