diff --git a/packages/system/nats/Makefile b/packages/system/nats/Makefile
index 88883ab0a..1fd4febc6 100644
--- a/packages/system/nats/Makefile
+++ b/packages/system/nats/Makefile
@@ -1,7 +1,10 @@
 include ../../../hack/package.mk
 
+test:
+	helm unittest .
+
 update:
 	rm -rf charts
 	helm repo add nats https://nats-io.github.io/k8s/helm/charts/
 	helm repo update nats
-	helm pull nats/nats --untar --untardir charts
+	helm pull nats/nats --untar --untardir charts --version 1.3.16
diff --git a/packages/system/nats/charts/nats/Chart.yaml b/packages/system/nats/charts/nats/Chart.yaml
index 2f0edf48b..12ed4c864 100644
--- a/packages/system/nats/charts/nats/Chart.yaml
+++ b/packages/system/nats/charts/nats/Chart.yaml
@@ -1,5 +1,5 @@
 apiVersion: v2
-appVersion: 2.11.8
+appVersion: 2.11.10
 description: A Helm chart for the NATS.io High Speed Cloud Native Distributed Communications
   Technology.
 home: http://github.com/nats-io/k8s
@@ -13,4 +13,4 @@ maintainers:
   name: The NATS Authors
   url: https://github.com/nats-io
 name: nats
-version: 1.3.13
+version: 1.3.16
diff --git a/packages/system/nats/charts/nats/files/nats-box/deployment/container.yaml b/packages/system/nats/charts/nats/files/nats-box/deployment/container.yaml
index aa1753b4b..331c7d6ac 100644
--- a/packages/system/nats/charts/nats/files/nats-box/deployment/container.yaml
+++ b/packages/system/nats/charts/nats/files/nats-box/deployment/container.yaml
@@ -44,3 +44,6 @@ volumeMounts:
 - name: {{ .name | quote }}
   mountPath: {{ .dir | quote }}
 {{- end }}
+
+resources:
+  {{- toYaml .Values.natsBox.container.resources | nindent 2 }}
\ No newline at end of file
diff --git a/packages/system/nats/charts/nats/files/stateful-set/nats-container.yaml b/packages/system/nats/charts/nats/files/stateful-set/nats-container.yaml
index c5402efea..8f8646fc0 100644
--- a/packages/system/nats/charts/nats/files/stateful-set/nats-container.yaml
+++ b/packages/system/nats/charts/nats/files/stateful-set/nats-container.yaml
@@ -104,3 +104,6 @@ volumeMounts:
 - name: {{ .name | quote }}
   mountPath: {{ .dir | quote }}
 {{- end }}
+
+resources:
+  {{- toYaml .Values.container.resources | nindent 2 }}
diff --git a/packages/system/nats/charts/nats/values.yaml b/packages/system/nats/charts/nats/values.yaml
index fa402f183..ceb450a7e 100644
--- a/packages/system/nats/charts/nats/values.yaml
+++ b/packages/system/nats/charts/nats/values.yaml
@@ -313,7 +313,7 @@ config:
 container:
   image:
     repository: nats
-    tag: 2.11.8-alpine
+    tag: 2.11.10-alpine
     pullPolicy:
     registry:
     # if digest is provided, it overrides tag (example: "sha256:abcdef1234567890")
@@ -351,6 +351,15 @@ container:
   merge: {}
   patch: []
 
+  # container resources
+  resources: {}
+  #  requests:
+  #    cpu: 100m
+  #    memory: 128Mi
+  #  limits:
+  #    cpu: 100m
+  #    memory: 128Mi
+
 ############################################################
 # stateful set -> pod template -> reloader container
 ############################################################
@@ -358,7 +367,7 @@ reloader:
   enabled: true
   image:
     repository: natsio/nats-server-config-reloader
-    tag: 0.19.1
+    tag: 0.20.1
     pullPolicy:
     registry:
     digest:
@@ -574,11 +583,12 @@ natsBox:
   container:
     image:
       repository: natsio/nats-box
-      tag: 0.18.0
+      tag: 0.19.2
       pullPolicy:
       registry:
       digest:
       fullImageName:
+      resources: {}
 
     # env var map, see nats.env for an example
     env: {}
diff --git a/packages/system/nats/tests/nats_test.yaml b/packages/system/nats/tests/nats_test.yaml
new file mode 100644
index 000000000..95b27d829
--- /dev/null
+++ b/packages/system/nats/tests/nats_test.yaml
@@ -0,0 +1,36 @@
+suite: cozy-nats chart rendering invariants
+release:
+  name: nats
+  namespace: cozy-nats
+tests:
+  - it: renders the nats StatefulSet on the pinned server image
+    template: charts/nats/templates/stateful-set.yaml
+    documentSelector:
+      path: kind
+      value: StatefulSet
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].image
+          value: nats:2.11.10-alpine
+
+  - it: keeps the cozystack PVC retention policy (delete on scale-down and teardown)
+    template: charts/nats/templates/stateful-set.yaml
+    documentSelector:
+      path: kind
+      value: StatefulSet
+    asserts:
+      - equal:
+          path: spec.persistentVolumeClaimRetentionPolicy.whenDeleted
+          value: Delete
+      - equal:
+          path: spec.persistentVolumeClaimRetentionPolicy.whenScaled
+          value: Delete
+
+  - it: emits a PodMonitor when the cozystack prometheus exporter is enabled
+    template: charts/nats/templates/pod-monitor.yaml
+    asserts:
+      - hasDocuments:
+          count: 1
+      - equal:
+          path: kind
+          value: PodMonitor