diff --git a/requirements.txt b/requirements.txt
index 2679c83..da49e39 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 requests==2.23.0
 selenium==3.141.0
 beautifulsoup4==4.8.2
-lxml==4.5.0
+lxml==4.9.1
 
 # Highlight the best score.
 pandas==1.0.3