diff --git a/slack/webhook-for-challenge/src/requirements.txt b/slack/webhook-for-challenge/src/requirements.txt
old mode 100755
new mode 100644
index 84b3e34..87e097f
--- a/slack/webhook-for-challenge/src/requirements.txt
+++ b/slack/webhook-for-challenge/src/requirements.txt
@@ -10,7 +10,7 @@ Flask-SQLAlchemy==2.3.2
 idna==2.6
 itsdangerous==0.24
 Jinja2==2.10
-Mako==1.0.7
+Mako==1.2.2
 MarkupSafe==1.0
 marshmallow==2.15.1
 marshmallow-sqlalchemy==0.13.1