diff --git a/cluster/kubemark/gce/config-default.sh b/cluster/kubemark/gce/config-default.sh
index 1fc342e9185..483893ab575 100644
--- a/cluster/kubemark/gce/config-default.sh
+++ b/cluster/kubemark/gce/config-default.sh
@@ -37,7 +37,7 @@ PREEMPTIBLE_NODE=${PREEMPTIBLE_NODE:-false}
 MASTER_OS_DISTRIBUTION=${KUBE_MASTER_OS_DISTRIBUTION:-gci}
 NODE_OS_DISTRIBUTION=${KUBE_NODE_OS_DISTRIBUTION:-debian}
 MASTER_IMAGE=${KUBE_GCE_MASTER_IMAGE:-cos-beta-59-9460-20-0}
-MASTER_IMAGE_PROJECT=${KUBE_GCE_MASTER_PROJECT:-google-containers}
+MASTER_IMAGE_PROJECT=${KUBE_GCE_MASTER_PROJECT:-cos-cloud}
 
 NETWORK=${KUBE_GCE_NETWORK:-default}
 INSTANCE_PREFIX="${INSTANCE_PREFIX:-"default"}"