diff --git a/ansible/roles/glance/tasks/bootstrap_service.yml b/ansible/roles/glance/tasks/bootstrap_service.yml
index 0b32234461b94fda06c9c5ed4bc102276ba677d4..decc23177dd168d04e995f24233260a395bf5817 100644
--- a/ansible/roles/glance/tasks/bootstrap_service.yml
+++ b/ansible/roles/glance/tasks/bootstrap_service.yml
@@ -1,3 +1,4 @@
+---
 - name: Running Glance bootstrap container
   kolla_docker:
     action: "start_container"
diff --git a/ansible/roles/heat/tasks/bootstrap_service.yml b/ansible/roles/heat/tasks/bootstrap_service.yml
index 58a571c670dbaa6951aa8ce48d11445e3ed65b51..f3d874c1a5dfca7451d9b119a170e544ea3ef5ab 100644
--- a/ansible/roles/heat/tasks/bootstrap_service.yml
+++ b/ansible/roles/heat/tasks/bootstrap_service.yml
@@ -1,3 +1,4 @@
+---
 - name: Running Heat bootstrap container
   kolla_docker:
     action: "start_container"
diff --git a/ansible/roles/ironic/tasks/bootstrap_service.yml b/ansible/roles/ironic/tasks/bootstrap_service.yml
index 863bdc02d200c876264de33e85b4f863078696fc..986d1a6572db6e2c28a0d64f0a3ad89639d9d088 100644
--- a/ansible/roles/ironic/tasks/bootstrap_service.yml
+++ b/ansible/roles/ironic/tasks/bootstrap_service.yml
@@ -1,3 +1,4 @@
+---
 - name: Running Ironic bootstrap container
   kolla_docker:
     action: "start_container"
diff --git a/ansible/roles/kibana/tasks/pull.yml b/ansible/roles/kibana/tasks/pull.yml
index b97d0029d3bf2e46cbb3644190c1c9f36236c59f..afe39cd3e6bf922ae46f56ae2a074ccb514e7a50 100644
--- a/ansible/roles/kibana/tasks/pull.yml
+++ b/ansible/roles/kibana/tasks/pull.yml
@@ -1,3 +1,4 @@
+---
 - name: Pulling Kibana image
   kolla_docker:
     action: "pull_image"
diff --git a/ansible/roles/prechecks/vars/main.yml b/ansible/roles/prechecks/vars/main.yml
index 1dff8659653f61bd92ec5be3baeb12c6bcd903d7..fd2237209ddfb93ade68bc3aa82d280bc0ea8d25 100644
--- a/ansible/roles/prechecks/vars/main.yml
+++ b/ansible/roles/prechecks/vars/main.yml
@@ -1,3 +1,4 @@
+---
 docker_version_min: '1.10.0'
 docker_py_version_min: '1.6.0'
 ansible_version_min: '2.0.0'
diff --git a/docker/bifrost/bifrost-base/build_arg.yml b/docker/bifrost/bifrost-base/build_arg.yml
index c069fc2a33a3f0ffda680f1e267cfd4624680627..b1384f793ddc055c4607c133748ec293dc3692ad 100644
--- a/docker/bifrost/bifrost-base/build_arg.yml
+++ b/docker/bifrost/bifrost-base/build_arg.yml
@@ -1,3 +1,4 @@
+---
 skip_bootstrap: true
 skip_start: true
 install_dib: true