diff --git a/demos/dact/backend/requirements.txt b/demos/dact/backend/requirements.txt
old mode 100755
new mode 100644
index 2ef682a..736e32e
--- a/demos/dact/backend/requirements.txt
+++ b/demos/dact/backend/requirements.txt
@@ -1,6 +1,6 @@
 autopep8==1.5.2
 click==7.1.2
-Flask==1.1.2
+Flask==2.3.2
 Flask-Cors==3.0.8
 itsdangerous==1.1.0
 Jinja2==2.11.2