diff --git a/PersonalAccessTokenAPIAppSample/requirements.txt b/PersonalAccessTokenAPIAppSample/requirements.txt
index 74c544a..e503bc6 100644
--- a/PersonalAccessTokenAPIAppSample/requirements.txt
+++ b/PersonalAccessTokenAPIAppSample/requirements.txt
@@ -3,4 +3,4 @@ werkzeug>=1,<2
 flask-session~=0.3.2
 requests>=2,<3
 msal>=0.6.1,<2
-
+markupsafe==2.0.1