diff --git a/abstract-factory/abstract-factory.ts b/abstract-factory/abstract-factory.ts
index 4c72b5f..d14dde8 100644
--- a/abstract-factory/abstract-factory.ts
+++ b/abstract-factory/abstract-factory.ts
@@ -28,7 +28,7 @@ class ProductB extends AbstractProductB {
 
 abstract class AbstractFactory {
   abstract createProductA(): AbstractProductA;
-  abstract createProductB(): AbstractProductA;
+  abstract createProductB(): AbstractProductB;
 }
 
 class NewYorkFactory extends AbstractFactory {
@@ -59,4 +59,4 @@ class CaliforniaFactory extends AbstractFactory {
   const calFactory = new CaliforniaFactory();
   calFactory.createProductA();
   calFactory.createProductB();
-})();
\ No newline at end of file
+})();