diff --git a/requirements.txt b/requirements.txt
index c0fd206..9551433 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ jupyter-core==4.4.0
 keyboard==0.13.2
 kiwisolver==1.0.1
 lazy-object-proxy==1.3.1
-lxml==4.2.5
+lxml==4.9.1
 MarkupSafe==1.1.1
 matplotlib==3.1.3
 mccabe==0.6.1