diff --git a/requirements.txt b/requirements.txt
index ab90bc1..485d8a5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ cffi==1.14.5
 chardet==3.0.4
 cryptography==36.0.0
 click==8.0.3
-Flask==1.1.2
+Flask==2.1.3
 docutils==0.18.1
 Flask-Mail==0.9.1
 Flask-MySQL==1.5.2