diff --git a/git_trophy_lambda/requirements.txt b/git_trophy_lambda/requirements.txt
index 7a25a53..caab465 100644
--- a/git_trophy_lambda/requirements.txt
+++ b/git_trophy_lambda/requirements.txt
@@ -9,7 +9,7 @@ chardet==3.0.4
 click==6.6
 delegator.py==0.1.1
 durationpy==0.5
-Flask==1.1.2
+Flask==1.0
 Flask-Cors==3.0.9
 future==0.18.2
 git-lambda==1.1.3
diff --git a/requirements.txt b/requirements.txt
index abe7729..0399963 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ click==6.7
 delegator.py==0.0.13
 docutils==0.13.1
 durationpy==0.4
-Flask==0.12.2
+Flask==1.0
 Flask-Cors==3.0.3
 future==0.16.0
 futures==3.1.1