diff --git a/gce-create-instances.yml b/gce-create-instances.yml
index daf478e..19d1110 100644
--- a/gce-create-instances.yml
+++ b/gce-create-instances.yml
@@ -21,7 +21,7 @@
       name: "{{ host_prefix }}"
       num_instances: "{{ num_instances | default(1) }}"
       machine_type: "{{ machine_type }}"
-      image: "{{ image }}"
+      image_family: "{{ image_family }}"
       disk_size: "{{ disk_size }}"
       zone: "{{ zone }}"
       project_id: "{{ project_id }}"
diff --git a/gce-properties.yml b/gce-properties.yml
index 396e717..29255c3 100644
--- a/gce-properties.yml
+++ b/gce-properties.yml
@@ -7,8 +7,8 @@
 #machine_type: 'n1-standard-4'
 #machine_type: 'n1-standard-2'
 #image: 'centos-7-v20180104'
-image: 'centos-7-drawfork'
-#image: 'centos-7-drawfork-v20180327'
+image_family: 'centos-7-drawfork'
+#image_family: 'centos-7-drawfork-v20180327'
 #image: 'centos-7'
 #image: 'centos-7-v20170918'
 #image: 'centos-7-v20160511'