diff --git a/flask/21_user_authentication_3/requirements.txt b/flask/21_user_authentication_3/requirements.txt
index 5800434..dedd606 100644
--- a/flask/21_user_authentication_3/requirements.txt
+++ b/flask/21_user_authentication_3/requirements.txt
@@ -8,7 +8,7 @@ Flask-SQLAlchemy==1.0
 Flask-Script==0.6.6
 Flask-WTF==0.9.4
 Jinja2==2.11.3
-Mako==0.9.1
+Mako==1.2.2
 MarkupSafe==0.18
 SQLAlchemy==0.9.9
 WTForms==1.0.5