diff --git a/ts/src/composite/index.ts b/ts/src/composite/index.ts
index c645cad..d670104 100644
--- a/ts/src/composite/index.ts
+++ b/ts/src/composite/index.ts
@@ -20,7 +20,7 @@ class Department implements component {
 
 class Company implements component {
   name: string;
-  children: Company[] = [];
+  children: component[] = [];
   constructor(name: string) {
     this.name = name;
   }