diff --git a/python-server/guestbook/requirements.txt b/python-server/guestbook/requirements.txt
index 3a5e0d3..8118179 100644
--- a/python-server/guestbook/requirements.txt
+++ b/python-server/guestbook/requirements.txt
@@ -1,4 +1,4 @@
-Flask==0.10
+Flask==1.0
 flask-bootstrap==3.1.1.2
 flask-wtf==0.9.4
 flask_testing==0.4.1