diff --git a/samples/subscription/ppsubscribe/requirements.txt b/samples/subscription/ppsubscribe/requirements.txt
index 328e65c9..55c9c352 100644
--- a/samples/subscription/ppsubscribe/requirements.txt
+++ b/samples/subscription/ppsubscribe/requirements.txt
@@ -1,6 +1,6 @@
 Flask==0.10.1
 Flask-Script==0.6.7
-Jinja2==2.7.1
+Jinja2==3.1.3
 MarkupSafe==0.18
 Werkzeug==0.9.4
 httplib2==0.8