diff --git a/service-mesh/istio/sample/istio-plural-course/03/demos/src/productpage/requirements.txt b/service-mesh/istio/sample/istio-plural-course/03/demos/src/productpage/requirements.txt
index 9cc5ef8..821bdda 100644
--- a/service-mesh/istio/sample/istio-plural-course/03/demos/src/productpage/requirements.txt
+++ b/service-mesh/istio/sample/istio-plural-course/03/demos/src/productpage/requirements.txt
@@ -3,7 +3,7 @@ chardet==3.0.4
 Click==7.0
 contextlib2==0.5.5
 dominate==2.3.5
-Flask==1.0.2
+Flask==2.3.2
 Flask-Bootstrap==3.3.7.1
 Flask-JSON==0.3.3
 future==0.18.3