diff --git a/collection/opendb-contacts/collection.json b/collection/opendb-contacts/collection.json
index a5a0ffe..e0e0d14 100644
--- a/collection/opendb-contacts/collection.json
+++ b/collection/opendb-contacts/collection.json
@@ -3,9 +3,9 @@
     "bsonType": "object",
     "permission": {
       "read": true,
-      "create": true,
-      "update": true,
-      "delete": true
+      "create": false,
+      "update": false,
+      "delete": false
     },
     "required": ["username", "mobile"],
     "properties": {