diff --git a/requirements.txt b/requirements.txt
index 69e52af..eec4ad1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ flask-marshmallow==0.11.0
 flask-restful==0.3.8
 flask-sqlalchemy==2.4.1
 flask-wtf==0.14.3
-flask==1.1.1
+flask==2.2.5
 gevent==1.4.0
 google-api-python-client==1.7.11
 google-auth-httplib2==0.0.3