diff --git a/demo_data/requirements.txt b/demo_data/requirements.txt
index 91aa4dc..2a4796d 100644
--- a/demo_data/requirements.txt
+++ b/demo_data/requirements.txt
@@ -63,7 +63,7 @@ et-xmlfile==1.0.1
 fastcache==1.1.0
 filelock==3.0.12
 flake8==3.8.3
-Flask==1.1.2
+Flask==2.3.2
 fsspec==0.7.4
 future==0.18.3
 gast==0.3.3