diff --git a/iap/app_engine_app/requirements.txt b/iap/app_engine_app/requirements.txt
index 484d3c57497..d934093767d 100644
--- a/iap/app_engine_app/requirements.txt
+++ b/iap/app_engine_app/requirements.txt
@@ -1 +1 @@
-flask==0.12.2
+flask==1.0
diff --git a/iap/requirements.txt b/iap/requirements.txt
index 756611f4a61..71a27557141 100644
--- a/iap/requirements.txt
+++ b/iap/requirements.txt
@@ -1,6 +1,6 @@
 PyJWT==1.5.3
 cryptography==2.0.3
-flask==0.12.2
+flask==1.0
 google-auth==1.1.0
 gunicorn==19.7.1
 requests==2.18.4