diff --git a/requirements.txt b/requirements.txt
index 09f49dd..90cd4f6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ jupyter-core==4.4.0
 kiwisolver==1.0.1
 kubernetes==6.0.0
 lazy-object-proxy==1.3.1
-lxml==4.2.1
+lxml==4.9.1
 MarkupSafe==1.0
 matplotlib==2.2.2
 mccabe==0.6.1