diff --git a/requirements.txt b/requirements.txt
index 97d4441..4701edb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 defusedxml==0.5.0
-flask==0.11.1
+flask==1.0
 isodate==0.5.4
 itsdangerous==0.24
 Jinja2==2.8