diff --git a/online-boutique-demo/src/emailservice/requirements.txt b/online-boutique-demo/src/emailservice/requirements.txt
index 0bf8440..7a64712 100644
--- a/online-boutique-demo/src/emailservice/requirements.txt
+++ b/online-boutique-demo/src/emailservice/requirements.txt
@@ -56,7 +56,7 @@ httplib2==0.19.0
     #   google-auth-httplib2
 idna==2.10
     # via requests
-jinja2==2.11.3
+jinja2==3.1.5
     # via -r requirements.in
 markupsafe==1.1.1
     # via jinja2