diff --git a/package.json b/package.json
index e1c2156c4..814c5e2d7 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
   "jsnext:main": "dist/es/index.js",
   "license": "MIT",
   "scripts": {
-    "build:types": "flow-copy-source --ignore \"**/*.{jest,e2e,example}.js\" source/WindowScroller dist/es/WindowScroller",
+    "build:types": "flow-copy-source --ignore \"**/*.{jest,e2e,example}.js\" source/WindowScroller dist/es/WindowScroller && flow-copy-source --ignore \"**/*.{jest,e2e,example}.js\" source/AutoSizer dist/es/AutoSizer ",
     "build": "npm run build:commonjs && npm run build:css && npm run build:es && npm run build:demo && npm run build:umd",
     "build:commonjs": "npm run clean:commonjs && cross-env NODE_ENV=production cross-env BABEL_ENV=commonjs babel source --out-dir dist/commonjs",
     "build:css": "postcss source/styles.css -o styles.css --use autoprefixer",
diff --git a/source/AutoSizer/AutoSizer.js b/source/AutoSizer/AutoSizer.js
index 296b4ca33..f6ad9cb00 100644
--- a/source/AutoSizer/AutoSizer.js
+++ b/source/AutoSizer/AutoSizer.js
@@ -1,13 +1,16 @@
 /** @flow */
 
-import type {Size} from './types';
-
 import * as React from 'react';
 import createDetectElementResize from '../vendor/detectElementResize';
 
+type Size = {
+  height: number,
+  width: number,
+};
+
 type Props = {
   /** Function responsible for rendering children.*/
-  children: (warams: Size) => React.Element<*>,
+  children: Size => React.Element<*>,
 
   /** Default height to use for initial render; useful for SSR */
   defaultHeight?: number,
@@ -25,7 +28,7 @@ type Props = {
   nonce?: string,
 
   /** Callback to be invoked on-resize */
-  onResize: (params: Size) => void,
+  onResize: Size => void,
 };
 
 type State = {
@@ -92,8 +95,8 @@ export default class AutoSizer extends React.PureComponent<Props, State> {
     // Outer div should not force width/height since that may prevent containers from shrinking.
     // Inner component should overflow and use calculated width/height.
     // See issue #68 for more information.
-    const outerStyle: any = {overflow: 'visible'};
-    const childParams: any = {};
+    const outerStyle: Object = {overflow: 'visible'};
+    const childParams: Object = {};
 
     if (!disableHeight) {
       outerStyle.height = 0;
@@ -159,7 +162,7 @@ export default class AutoSizer extends React.PureComponent<Props, State> {
     }
   };
 
-  _setRef = (autoSizer: HTMLElement | null) => {
+  _setRef = (autoSizer: ?HTMLElement) => {
     this._autoSizer = autoSizer;
   };
 }
diff --git a/source/AutoSizer/index.js b/source/AutoSizer/index.js
index e307710fb..27514059c 100644
--- a/source/AutoSizer/index.js
+++ b/source/AutoSizer/index.js
@@ -1,6 +1,4 @@
 // @flow
 
-export type {Size} from './types';
-
 export {default} from './AutoSizer';
 export {default as AutoSizer} from './AutoSizer';
diff --git a/source/AutoSizer/types.js b/source/AutoSizer/types.js
deleted file mode 100644
index 5151542dd..000000000
--- a/source/AutoSizer/types.js
+++ /dev/null
@@ -1,6 +0,0 @@
-// @flow
-
-export type Size = {
-  height: number,
-  width: number,
-};