diff --git a/types/next/document.d.ts b/types/next/document.d.ts
index bb0e9ff40f..febd36eb4a 100644
--- a/types/next/document.d.ts
+++ b/types/next/document.d.ts
@@ -5,7 +5,7 @@ import { DefaultQuery } from "./router";
 export interface RenderPageResponse {
     buildManifest: Record<string, any>;
     html?: string;
-    head?: React.ReactElement<any>[];
+    head?: Array<React.ReactElement<any>>;
 }
 
 export interface PageProps {
@@ -37,7 +37,7 @@ export interface NextDocumentContext<Q extends DefaultQuery = DefaultQuery> exte
  * https://github.com/zeit/next.js/blob/7.0.0/server/document.js#L16
  */
 export interface DefaultDocumentIProps extends RenderPageResponse {
-    styles?: React.ReactElement<any>[];
+    styles?: Array<React.ReactElement<any>>;
 }
 
 /**
diff --git a/types/next/head.d.ts b/types/next/head.d.ts
index aa86aa5e87..d46b371d11 100644
--- a/types/next/head.d.ts
+++ b/types/next/head.d.ts
@@ -3,6 +3,6 @@ import * as React from "react";
 export function defaultHead(): JSX.Element[];
 export default class Head extends React.Component {
     static canUseDOM: boolean;
-    static peek(): React.ReactElement<any>[];
-    static rewind(): React.ReactElement<any>[];
+    static peek(): Array<React.ReactElement<any>>;
+    static rewind(): Array<React.ReactElement<any>>;
 }