diff --git a/packages/core-extensions/src/internal/mapped-keys.type.ts b/packages/core-extensions/src/internal/mapped-keys.type.ts
index aca77e4..86091d4 100644
--- a/packages/core-extensions/src/internal/mapped-keys.type.ts
+++ b/packages/core-extensions/src/internal/mapped-keys.type.ts
@@ -1,8 +1,7 @@
-export type MappedKeys<T, R extends string> =
-	T extends Array<infer U>
-		? Array<MappedKeys<U, R>>
-		: T extends object
-			? {
-					[K in keyof T as R]: MappedKeys<T[K], R>
-				}
-			: T
+export type MappedKeys<T, R extends string> = T extends any[]
+	? { [K in keyof T]: MappedKeys<T[K], R> }
+	: T extends object
+		? {
+				[K in keyof T as R]: MappedKeys<T[K], R>
+			}
+		: T