diff --git a/service-mesh/istio/sample/istio-plural-course/02/demos/src/productpage/requirements.txt b/service-mesh/istio/sample/istio-plural-course/02/demos/src/productpage/requirements.txt
index 8e696e0..6f9e1f1 100644
--- a/service-mesh/istio/sample/istio-plural-course/02/demos/src/productpage/requirements.txt
+++ b/service-mesh/istio/sample/istio-plural-course/02/demos/src/productpage/requirements.txt
@@ -1,4 +1,4 @@
-certifi==2019.3.9
+certifi==2023.7.22
 chardet==3.0.4
 Click==7.0
 contextlib2==0.5.5