diff --git a/datacamp-notebooks/forecast-delivery-time/requirements.txt b/datacamp-notebooks/forecast-delivery-time/requirements.txt
old mode 100755
new mode 100644
index fbfa5a0..8fe0bc7
--- a/datacamp-notebooks/forecast-delivery-time/requirements.txt
+++ b/datacamp-notebooks/forecast-delivery-time/requirements.txt
@@ -1,4 +1,4 @@
-Flask==1.0.2
+Flask==2.3.2
 googlemaps==3.0.2
 gunicorn==19.9.0
 numpy==1.15.0