diff --git a/istio/example/bookinfo/src/productpage/requirements.txt b/istio/example/bookinfo/src/productpage/requirements.txt
index 37f99e8..75561e2 100644
--- a/istio/example/bookinfo/src/productpage/requirements.txt
+++ b/istio/example/bookinfo/src/productpage/requirements.txt
@@ -8,7 +8,7 @@ Flask-Bootstrap==3.3.7.1
 Flask-JSON==0.3.3
 future==0.17.1
 futures==3.1.1
-gevent==1.4.0
+gevent==23.9.1
 greenlet==0.4.15
 idna==2.8
 itsdangerous==1.1.0