diff --git a/gce/vm.sh b/gce/vm.sh
index 9fd03d4..f9cb4fb 100755
--- a/gce/vm.sh
+++ b/gce/vm.sh
@@ -53,8 +53,8 @@
     "ubuntu-16-04-slave-8 ubuntu-1604-lts ubuntu_16.04-x86_64-8 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-16-04-slave.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
     "ubuntu-docker-slave-1 https://www.googleapis.com/compute/v1/projects/ubuntu-os-cloud/global/images/ubuntu-1510-wily-v20151026 ubuntu_15.10-x86_64-docker-1 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-15-10-slave.sh ubuntu-15-10-docker.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
     "ubuntu-docker-slave-2 https://www.googleapis.com/compute/v1/projects/ubuntu-os-cloud/global/images/ubuntu-1510-wily-v20151026 ubuntu_15.10-x86_64-docker-2 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-15-10-slave.sh ubuntu-15-10-docker.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
-    "ubuntu-docker-slave-3 https://www.googleapis.com/compute/v1/projects/ubuntu-os-cloud/global/images/ubuntu-1510-wily-v20151026 ubuntu_15.10-x86_64-docker-2 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-15-10-slave.sh ubuntu-15-10-docker.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
-    "ubuntu-docker-slave-4 https://www.googleapis.com/compute/v1/projects/ubuntu-os-cloud/global/images/ubuntu-1510-wily-v20151026 ubuntu_15.10-x86_64-docker-2 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-15-10-slave.sh ubuntu-15-10-docker.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
+    "ubuntu-docker-slave-3 https://www.googleapis.com/compute/v1/projects/ubuntu-os-cloud/global/images/ubuntu-1510-wily-v20151026 ubuntu_15.10-x86_64-docker-3 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-15-10-slave.sh ubuntu-15-10-docker.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
+    "ubuntu-docker-slave-4 https://www.googleapis.com/compute/v1/projects/ubuntu-os-cloud/global/images/ubuntu-1510-wily-v20151026 ubuntu_15.10-x86_64-docker-4 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-15-10-slave.sh ubuntu-15-10-docker.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
     "freebsd-11-slave-1 https://www.googleapis.com/compute/v1/projects/freebsd-org-cloud-dev/global/images/freebsd-11-0-stable-amd64-2017-01-06 freebsd-11-1 europe-west1-d default startup-script=jenkins-slave.sh freebsd-slave.sh freebsd-ci-homedir.sh"
     "freebsd-11-slave-2 https://www.googleapis.com/compute/v1/projects/freebsd-org-cloud-dev/global/images/freebsd-11-0-stable-amd64-2017-01-06 freebsd-11-2 europe-west1-d default startup-script=jenkins-slave.sh freebsd-slave.sh freebsd-ci-homedir.sh"
     "freebsd-11-slave-3 https://www.googleapis.com/compute/v1/projects/freebsd-org-cloud-dev/global/images/freebsd-11-0-stable-amd64-2017-01-06 freebsd-11-3 europe-west1-d default startup-script=jenkins-slave.sh freebsd-slave.sh freebsd-ci-homedir.sh"