diff --git a/app/assets/javascripts/discourse/app/models/category.js b/app/assets/javascripts/discourse/app/models/category.js
index bc4f1f91272..865787e5266 100644
--- a/app/assets/javascripts/discourse/app/models/category.js
+++ b/app/assets/javascripts/discourse/app/models/category.js
@@ -1,5 +1,6 @@
 import { warn } from "@ember/debug";
 import { get } from "@ember/object";
+import { on } from "@ember-decorators/object";
 import { ajax } from "discourse/lib/ajax";
 import { NotificationLevels } from "discourse/lib/notification-levels";
 import PermissionType from "discourse/models/permission-type";
@@ -8,7 +9,7 @@ import Site from "discourse/models/site";
 import User from "discourse/models/user";
 import { getOwnerWithFallback } from "discourse-common/lib/get-owner";
 import getURL from "discourse-common/lib/get-url";
-import discourseComputed, { on } from "discourse-common/utils/decorators";
+import discourseComputed from "discourse-common/utils/decorators";
 import { MultiCache } from "discourse-common/utils/multi-cache";
 
 const STAFF_GROUP_NAME = "staff";
diff --git a/app/assets/javascripts/discourse/app/models/group.js b/app/assets/javascripts/discourse/app/models/group.js
index 580efaad6b0..220c131f446 100644
--- a/app/assets/javascripts/discourse/app/models/group.js
+++ b/app/assets/javascripts/discourse/app/models/group.js
@@ -2,6 +2,7 @@ import EmberObject from "@ember/object";
 import { dependentKeyCompat } from "@ember/object/compat";
 import { equal } from "@ember/object/computed";
 import { isEmpty } from "@ember/utils";
+import { observes } from "@ember-decorators/object";
 import { Promise } from "rsvp";
 import { ajax } from "discourse/lib/ajax";
 import Category from "discourse/models/category";
@@ -9,7 +10,7 @@ import GroupHistory from "discourse/models/group-history";
 import RestModel from "discourse/models/rest";
 import Topic from "discourse/models/topic";
 import User from "discourse/models/user";
-import discourseComputed, { observes } from "discourse-common/utils/decorators";
+import discourseComputed from "discourse-common/utils/decorators";
 
 export default class Group extends RestModel {
   static findAll(opts) {