diff --git a/student/istio-1.2.2/samples/bookinfo/src/productpage/requirements.txt b/student/istio-1.2.2/samples/bookinfo/src/productpage/requirements.txt
index f68c925..b1edfbb 100644
--- a/student/istio-1.2.2/samples/bookinfo/src/productpage/requirements.txt
+++ b/student/istio-1.2.2/samples/bookinfo/src/productpage/requirements.txt
@@ -27,5 +27,5 @@ thrift==0.11.0
 tornado==4.5.3
 urllib3==1.24.2
 visitor==0.1.3
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 wrapt==1.11.1