diff --git a/lib/db/class/property.js b/lib/db/class/property.js
index b512d56..e631b7a 100644
--- a/lib/db/class/property.js
+++ b/lib/db/class/property.js
@@ -214,6 +214,9 @@ Property.update = function (property, reload) {
   if (property.type !== undefined) {
     promises.push(this.db.exec(prefix + 'TYPE ' + property.type));
   }
+  if (property.readonly !== undefined) {
+    promises.push(this.db.exec(prefix + 'READONLY ' + (property.readonly ? 'true' : 'false')));
+  }
   if (property.mandatory !== undefined) {
     promises.push(this.db.exec(prefix + 'MANDATORY ' + (property.mandatory ? 'true' : 'false')));
   }