diff --git a/13. Application 4 - Building a Website with Python and Flask/requirements.txt b/13. Application 4 - Building a Website with Python and Flask/requirements.txt
index 68616d1..315c39d 100644
--- a/13. Application 4 - Building a Website with Python and Flask/requirements.txt	
+++ b/13. Application 4 - Building a Website with Python and Flask/requirements.txt	
@@ -1,6 +1,6 @@
 Flask==0.10.1
 gunicorn==19.6.0
 itsdangerous==0.24
-Jinja2==2.8
+Jinja2==2.11.3
 MarkupSafe==0.23
 Werkzeug==0.15.3