diff --git a/addon/components/visjs-child.js b/addon/components/visjs-child.js
index 2d89a0b..f93cdc7 100644
--- a/addon/components/visjs-child.js
+++ b/addon/components/visjs-child.js
@@ -2,8 +2,8 @@ import Ember from 'ember';
 import ChildMixin from 'ember-cli-visjs/mixins/child';
 
 export default Ember.Component.extend(ChildMixin, {
-  didCreateLayer: Ember.K,
-  willDestroyLayer: Ember.K,
+  didCreateLayer() {},
+  willDestroyLayer() {},
 
   layerSetup() {
     if (this.get('containerLayer')) {