diff --git a/requirements.txt b/requirements.txt
index b491466..75d3b4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ coveralls==1.3.0
 dnspython==1.15.0
 docopt==0.6.2
 email-validator==1.0.3
-Flask==0.12.2
+Flask==1.0
 idna==2.6
 itsdangerous==0.24
 Jinja2==2.10