diff --git a/flask/21_user_authentication_3/requirements.txt b/flask/21_user_authentication_3/requirements.txt
index 5800434..604ef9b 100644
--- a/flask/21_user_authentication_3/requirements.txt
+++ b/flask/21_user_authentication_3/requirements.txt
@@ -1,4 +1,4 @@
-Flask==0.10.1
+Flask==2.3.2
 Flask-Bootstrap==3.0.3.1
 Flask-Login==0.3.1
 Flask-Mail==0.9.0