diff --git a/package.json b/package.json
index e57bdae93..9a44f634a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zod",
-  "version": "3.21.2",
+  "version": "3.21.3",
   "author": "Colin McDonnell <colin@colinhacks.com>",
   "repository": {
     "type": "git",
diff --git a/playground.ts b/playground.ts
index d17b18eb4..b22662a96 100644
--- a/playground.ts
+++ b/playground.ts
@@ -1,2 +1,18 @@
 import { z } from "./src";
 z;
+
+const baseCategorySchema = z.object({
+  name: z.string().brand("CategoryName"),
+});
+
+type CategoryInput = z.input<typeof baseCategorySchema> & {
+  subcategories: CategoryInput[];
+};
+type CategoryOutput = z.output<typeof baseCategorySchema> & {
+  subcategories: CategoryOutput[];
+};
+
+const categorySchema: z.ZodType<CategoryOutput, any, CategoryInput> =
+  baseCategorySchema.extend({
+    subcategories: z.lazy(() => categorySchema.array()),
+  });