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..42a9ff8 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
@@ -24,7 +24,7 @@ simplejson==3.16.0
 six==1.12.0
 threadloop==1.0.2
 thrift==0.11.0
-tornado==4.5.3
+tornado==6.3.2
 urllib3==1.26.5
 visitor==0.1.3
 Werkzeug==2.2.3