diff --git a/.travis.yml b/.travis.yml
index 7f73a7d..13ac1b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,12 +19,14 @@ deploy:
   skip_cleanup: true
   keyfile: service-account-staging.json
   project: unpkg-staging
+  config: app-staging.yaml
   on:
     branch: gae-staging
 - provider: gae
   skip_cleanup: true
   keyfile: service-account.json
   project: unpkg-gcp
+  config: app.yaml
   on:
     branch: gae
 - provider: script
diff --git a/app-staging.yaml b/app-staging.yaml
new file mode 100644
index 0000000..1957016
--- /dev/null
+++ b/app-staging.yaml
@@ -0,0 +1,10 @@
+runtime: nodejs
+env: flex
+
+resources:
+  cpu: 1
+  memory_gb: 0.5
+  disk_size_gb: 10
+
+manual_scaling:
+  instances: 1
diff --git a/app.yaml b/app.yaml
index 107f5b3..4e64af0 100644
--- a/app.yaml
+++ b/app.yaml
@@ -1,9 +1,6 @@
 runtime: nodejs
 env: flex
 
-# https://cloud.google.com/appengine/docs/flexible/nodejs/configuring-your-app-with-app-yaml
-manual_scaling:
-  instances: 1
 resources:
   cpu: 1
   memory_gb: 0.5