diff --git a/Starter Apps/REST-APIs/02 - Flask RESTful/code/requirements.txt b/Starter Apps/REST-APIs/02 - Flask RESTful/code/requirements.txt
index 4c80d89..906002c 100644
--- a/Starter Apps/REST-APIs/02 - Flask RESTful/code/requirements.txt	
+++ b/Starter Apps/REST-APIs/02 - Flask RESTful/code/requirements.txt	
@@ -70,7 +70,7 @@ jupyterlab-launcher==0.10.2
 lazy-object-proxy==1.3.1
 llvmlite==0.21.0
 locket==0.2.0
-lxml==4.1.1
+lxml==4.9.1
 MarkupSafe==1.0
 matplotlib==2.1.2
 mccabe==0.6.1