diff --git a/flask/19_user_authentication_1/requirements.txt b/flask/19_user_authentication_1/requirements.txt
index 0c6c567..3cce07a 100644
--- a/flask/19_user_authentication_1/requirements.txt
+++ b/flask/19_user_authentication_1/requirements.txt
@@ -1,4 +1,4 @@
-Flask==1.0
+Flask==2.3.2
 Flask-Bootstrap==3.0.3.1
 Flask-Mail==0.9.0
 Flask-Migrate==1.1.0