diff --git a/index.d.ts b/index.d.ts
index fa90177..39af31b 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -10,8 +10,8 @@ declare namespace intoStream {
 		| Iterable<Buffer | string>;
 
 	type InputObject =
-		| {[key: string]: any}
-		| Iterable<{[key: string]: any}>;
+		| object
+		| Iterable<object>;
 }
 
 declare const intoStream: {
diff --git a/index.test-d.ts b/index.test-d.ts
index d60efe9..482a255 100644
--- a/index.test-d.ts
+++ b/index.test-d.ts
@@ -25,10 +25,13 @@ intoStream(Promise.resolve(new Uint8Array(Buffer.from('unicorn').buffer))).pipe(
 const object = {foo: true};
 const objectArray = new Set([object, {bar: true}]);
 const objectIterable = new Set(objectArray);
+const arrayOfArrays = [[object]];
 
 intoStream.object(object).pipe(process.stdout);
 intoStream.object(objectArray).pipe(process.stdout);
 intoStream.object(objectIterable).pipe(process.stdout);
+intoStream.object(arrayOfArrays).pipe(process.stdout);
 intoStream.object(Promise.resolve(object)).pipe(process.stdout);
 intoStream.object(Promise.resolve(objectArray)).pipe(process.stdout);
 intoStream.object(Promise.resolve(objectIterable)).pipe(process.stdout);
+intoStream.object(Promise.resolve(arrayOfArrays)).pipe(process.stdout);