diff --git a/day4/myflaskapp/requirements/prod.txt b/day4/myflaskapp/requirements/prod.txt
index 9fae9b9..4417292 100644
--- a/day4/myflaskapp/requirements/prod.txt
+++ b/day4/myflaskapp/requirements/prod.txt
@@ -4,7 +4,7 @@
 Flask==1.0.2
 MarkupSafe==1.0
 Werkzeug==0.14.1
-Jinja2==2.10
+Jinja2==2.11.3
 itsdangerous==1.1.0
 click>=5.0