diff --git a/managed_vms/extending_runtime/requirements.txt b/managed_vms/extending_runtime/requirements.txt
index 470ef196fd9..fde725ee901 100644
--- a/managed_vms/extending_runtime/requirements.txt
+++ b/managed_vms/extending_runtime/requirements.txt
@@ -1,2 +1,2 @@
-Flask==0.10.1
+Flask==1.0
 gunicorn==19.4.5