diff --git a/deployments/portal-backstage/docker-compose.yml b/deployments/portal-backstage/docker-compose.yml
index bd20ae7a..4d1a834f 100644
--- a/deployments/portal-backstage/docker-compose.yml
+++ b/deployments/portal-backstage/docker-compose.yml
@@ -1,3 +1,4 @@
+---
 services:
   backstage:
     image: tyk-demo-backstage:1.0
diff --git a/deployments/portal-backstage/volumes/backstage/app-config.yaml b/deployments/portal-backstage/volumes/backstage/app-config.yaml
index 9e8de6e5..f2eb824f 100644
--- a/deployments/portal-backstage/volumes/backstage/app-config.yaml
+++ b/deployments/portal-backstage/volumes/backstage/app-config.yaml
@@ -1,3 +1,4 @@
+---
 app:
   title: Tyk Demo - Backstage Entity Provider Example
   baseUrl: http://localhost:3003
diff --git a/deployments/portal-backstage/volumes/backstage/tyk-catalog.yaml b/deployments/portal-backstage/volumes/backstage/tyk-catalog.yaml
index 6d8059aa..163d8c2b 100644
--- a/deployments/portal-backstage/volumes/backstage/tyk-catalog.yaml
+++ b/deployments/portal-backstage/volumes/backstage/tyk-catalog.yaml
@@ -1,3 +1,4 @@
+---
 # https://backstage.io/docs/features/software-catalog/descriptor-format#kind-system
 apiVersion: backstage.io/v1alpha1
 kind: System