diff --git a/istio/example/bookinfo/src/productpage/requirements.txt b/istio/example/bookinfo/src/productpage/requirements.txt
index 37f99e8..bff4e67 100644
--- a/istio/example/bookinfo/src/productpage/requirements.txt
+++ b/istio/example/bookinfo/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