diff --git a/charts/unifi-network-application/values.yaml b/charts/unifi-network-application/values.yaml
index 332283d..42a51b0 100644
--- a/charts/unifi-network-application/values.yaml
+++ b/charts/unifi-network-application/values.yaml
@@ -53,7 +53,8 @@ persistence:
   claimSuffix: config-claim
   annotations: {}
   labels: {}
-  accessModes: {}
+  accessModes:
+    - ReadWriteOnce
   # -- override storage class
   storageClass: ''
   volumeName: ''
@@ -84,7 +85,8 @@ mongodb:
     claimSuffix: db-claim
     annotations: {}
     labels: {}
-    accessModes: {}
+    accessModes:
+      - ReadWriteOnce
     # -- override storage class
     storageClass: ''
     volumeName: ''