diff --git a/clusters/k8s-avroid-office.prod.local/namespaces/prod/mermaid/argocd-apps-plantuml-network-policy.yaml b/clusters/k8s-avroid-office.prod.local/namespaces/prod/mermaid/argocd-apps-plantuml-network-policy.yaml
new file mode 100644
index 0000000..27dd688
--- /dev/null
+++ b/clusters/k8s-avroid-office.prod.local/namespaces/prod/mermaid/argocd-apps-plantuml-network-policy.yaml
@@ -0,0 +1,19 @@
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: mermaid-in
+  namespace: prod
+  labels:
+    app.kubernetes.io/managed-by: argocd
+spec:
+  podSelector:
+    matchLabels:
+      app.kubernetes.io/name: mermaid
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: ingress-nginx