diff --git a/slack_bot/requirements.txt b/slack_bot/requirements.txt
index c4bc60c..da1fd8a 100644
--- a/slack_bot/requirements.txt
+++ b/slack_bot/requirements.txt
@@ -8,7 +8,7 @@ chardet==3.0.4
 click==6.7
 docutils==0.14
 durationpy==0.5
-Flask==0.12.2
+Flask==1.0
 future==0.16.0
 hjson==3.0.1
 idna==2.5