diff --git a/threading-tutorial-main/requirements.txt b/threading-tutorial-main/requirements.txt
index af6c5c8..18f35d0 100644
--- a/threading-tutorial-main/requirements.txt
+++ b/threading-tutorial-main/requirements.txt
@@ -7,7 +7,7 @@ chardet==4.0.0
 greenlet==1.1.0
 idna==2.10
 importlib-metadata==4.6.0
-lxml==4.6.3
+lxml==4.9.1
 multidict==5.1.0
 psycopg2-binary==2.9.1
 PyYAML==5.4.1