diff --git a/requirements.txt b/requirements.txt
index 635f5f2..552e8d5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ certifi==2017.7.27.1
 chardet==3.0.4
 click==6.7
 docutils==0.14
-Flask==0.12.2
+Flask==1.0
 Flask-Sphinx-Themes==1.0.1
 idna==2.6
 imagesize==0.7.1