diff --git a/addon/services/embedded.ts b/addon/services/embedded.ts
index eda05a40..2986ea0c 100644
--- a/addon/services/embedded.ts
+++ b/addon/services/embedded.ts
@@ -3,7 +3,7 @@ import { getOwner } from '@ember/application'
 
 // eslint-disable-next-line ember/no-classic-classes
 const configService = ObjectProxy.extend({
-  init(...args) {
+  init(...args: Array<Record<string, unknown>>): void {
     this.content = getOwner(this).factoryFor('config:embedded').class
     this._super(...args)
   },