diff --git a/requirements.txt b/requirements.txt
index 65163e43..5fb6ff07 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ cryptography==1.3.1
 decorator==4.1.2
 enum34==1.1.3
 execnet==1.5.0
-Flask==0.10.1
+Flask==1.0
 FormEncode==1.3.1
 html2text==2016.9.19
 idna==2.1