diff --git a/requirements.txt b/requirements.txt
index b3e22db..ed12974 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,4 @@ cbint>=0.9.2
 python-dateutil
 pyinstaller==3.1.1
 requests>=2.20.0
-flask==0.12.4
+flask==1.0