diff --git a/index.d.ts b/index.d.ts
index 7fee55bc..6a3ff19c 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -47,7 +47,7 @@ export type Schema =
   schema.Object[] |
   schema.Union[] |
   schema.Values[] |
-  {[key: string]: Schema};
+  {[key: string]: Schema | Schema[]};
 
 export function normalize(
   data: any,