diff --git a/gce-create-instances.yml b/gce-create-instances.yml
index 6bf24e2..daf478e 100644
--- a/gce-create-instances.yml
+++ b/gce-create-instances.yml
@@ -22,6 +22,7 @@
       num_instances: "{{ num_instances | default(1) }}"
       machine_type: "{{ machine_type }}"
       image: "{{ image }}"
+      disk_size: "{{ disk_size }}"
       zone: "{{ zone }}"
       project_id: "{{ project_id }}"
       service_account_email: "{{ service_account_email }}"
diff --git a/gce-properties.yml b/gce-properties.yml
index 09b6fe2..37a5bb2 100644
--- a/gce-properties.yml
+++ b/gce-properties.yml
@@ -1,5 +1,6 @@
 ---
 credentials_file: ~/.apigee-secure/default-service-account.json
+disk_size: 30
 #machine_type: 'n1-highmem-8'
 machine_type: 'n1-standard-8'
 #machine_type: 'n1-standard-4'