diff --git a/12/web_example1/requirements.txt b/12/web_example1/requirements.txt
index 67e1235..4129b73 100644
--- a/12/web_example1/requirements.txt
+++ b/12/web_example1/requirements.txt
@@ -1,4 +1,4 @@
-Flask==1.0
+Flask==2.3.2
 Flask-Script==2.0.6
 Flask-WTF==0.14.2
 Mako==1.0.7