diff --git a/playground_flask/requirements.txt b/playground_flask/requirements.txt
index cfcf890..52b439c 100644
--- a/playground_flask/requirements.txt
+++ b/playground_flask/requirements.txt
@@ -7,7 +7,7 @@ Flask-SQLAlchemy==1.0
 Flask-Script==0.6.6
 Flask-WTF==0.9.4
 Jinja2==2.7.1
-Mako==0.9.1
+Mako==1.2.2
 MarkupSafe==0.18
 SQLAlchemy==0.9.9
 WTForms==1.0.5