diff --git a/23. Application 8 - Buidling a Web-based Financial Graph/Web-App/demo/requirements.txt b/23. Application 8 - Buidling a Web-based Financial Graph/Web-App/demo/requirements.txt
index b201344..5cde7ed 100644
--- a/23. Application 8 - Buidling a Web-based Financial Graph/Web-App/demo/requirements.txt	
+++ b/23. Application 8 - Buidling a Web-based Financial Graph/Web-App/demo/requirements.txt	
@@ -8,7 +8,7 @@ idna==2.8
 gunicorn==19.9.0
 itsdangerous==1.1.0
 Jinja2==2.10.1
-lxml==4.6.2
+lxml==4.9.1
 MarkupSafe==1.1.1
 numpy==1.17.0
 packaging==19.1