diff --git a/ClassExamples/ON47/StudentPassFail_Flask/test/requirements.txt b/ClassExamples/ON47/StudentPassFail_Flask/test/requirements.txt
index eb6294a..22131a8 100644
--- a/ClassExamples/ON47/StudentPassFail_Flask/test/requirements.txt
+++ b/ClassExamples/ON47/StudentPassFail_Flask/test/requirements.txt
@@ -1,5 +1,5 @@
 click==7.1.2
-Flask==1.1.2
+Flask==2.3.2
 h5py==2.10.0
 itsdangerous==1.1.0
 Jinja2==2.11.2