diff --git a/charts/tenant/templates/networkpolicy.yaml b/charts/tenant/templates/networkpolicy.yaml
new file mode 100644
index 0000000..2c762c0
--- /dev/null
+++ b/charts/tenant/templates/networkpolicy.yaml
@@ -0,0 +1,44 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: jupyter-netpol
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: jupyter
+    tenant: 'tenant-{{ .Values.name }}'
+spec:
+  podSelector:
+    matchLabels:
+      app: jupyter
+      tenant: 'tenant-{{ .Values.name }}'
+  policyTypes:
+    - Ingress
+    - Egress
+
+  # Entrée : Autorise le trafic vers le Notebook Jupyter sur le port 8888
+  ingress:
+    - ports:
+        - protocol: TCP
+          port: 8888
+
+  # Sortie : Restreint les communications aux composants strictement nécessaires
+  egress:
+    # 1. Résolution DNS dans kube-system
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+      ports:
+        - protocol: UDP
+          port: 53
+        - protocol: TCP
+          port: 53
+
+    # 2. Flux vers l'API MinIO (Stockage S3)
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: minio
+      ports:
+        - protocol: TCP
+          port: 9000