diff --git a/istio-1.2.0/samples/bookinfo/src/productpage/requirements.txt b/istio-1.2.0/samples/bookinfo/src/productpage/requirements.txt
index f68c925..3bef37b 100644
--- a/istio-1.2.0/samples/bookinfo/src/productpage/requirements.txt
+++ b/istio-1.2.0/samples/bookinfo/src/productpage/requirements.txt
@@ -13,7 +13,7 @@ greenlet==0.4.15
 idna==2.8
 itsdangerous==1.1.0
 jaeger-client==3.13.0
-Jinja2==2.10
+Jinja2==2.11.3
 json2html==1.2.1
 MarkupSafe==0.23
 nose==1.3.7