diff --git a/decline-on-card-authentication/server/python/requirements.txt b/decline-on-card-authentication/server/python/requirements.txt
index b2e90289..8739e488 100644
--- a/decline-on-card-authentication/server/python/requirements.txt
+++ b/decline-on-card-authentication/server/python/requirements.txt
@@ -4,7 +4,7 @@ Click==7.0
 Flask==1.0.3
 idna==2.8
 itsdangerous==1.1.0
-Jinja2==2.10.1
+Jinja2==2.11.3
 MarkupSafe==1.1.1
 python-dotenv==0.10.3
 requests==2.22.0