diff --git a/requirements.txt b/requirements.txt
index 3816b66..3fa6795 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ Keras-Preprocessing==1.0.2
 keyring==13.2.1
 kiwisolver==1.0.1
 lazy-object-proxy==1.3.1
-lxml==4.2.4
+lxml==4.9.1
 Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.2.3