diff --git a/demos/CloudSQL/cloudsql-geojson-api/requirements.txt b/demos/CloudSQL/cloudsql-geojson-api/requirements.txt
index feb2aba..b7e01fc 100644
--- a/demos/CloudSQL/cloudsql-geojson-api/requirements.txt
+++ b/demos/CloudSQL/cloudsql-geojson-api/requirements.txt
@@ -4,7 +4,7 @@
 # in `lib/` subdirectory.
 #
 # Note: The `lib` directory is added to `sys.path` by `appengine_config.py`.
-Flask==0.10
+Flask==1.0
 geojson
 git+git://github.com/geomet/geomet.git
 sqlparse