diff --git a/requirements.txt b/requirements.txt
index d707f2d..97d6cc6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ duckietown-serialization-ds1>=1.0.9,<2
 PyGeometry-z6
 
 beautifulsoup4>=4.6.3,<=4.7.1
-lxml==4.5.0
+lxml==4.9.1
 future
 scipy
 oyaml