diff --git a/requirements.txt b/requirements.txt
index 0f2a9bf..3114a47 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-Flask==1.1.1
+Flask==2.2.5
 line-bot-sdk==1.16.0
 psycopg2==2.8.4
 SQLAlchemy==1.3.9