diff --git a/addons/cssresources/README.md b/addons/cssresources/README.md
index 14bec5d98141..bdc7fe79efc9 100644
--- a/addons/cssresources/README.md
+++ b/addons/cssresources/README.md
@@ -35,7 +35,7 @@ import { withCssResources } from '@storybook/addon-cssresources';
 addDecorator(
   withCssResources({
     cssresources: [{
-        name: `bluetheme`,
+        id: `bluetheme`,
         code: `<style>body { background-color: lightblue; }</style>`,
         picked: false,
       },
@@ -48,11 +48,11 @@ storiesOf('Addons|Cssresources', module)
   .addDecorator(
     withCssResources({
       cssresources: [{
-          name: `fontawesome`,
+          id: `fontawesome`,
           code: `<link rel="stylesheet" type="text/css" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css"></link>`,
           picked: true,
         }, {
-          name: `whitetheme`,
+          id: `whitetheme`,
           code: `<style>.fa { color: #fff }</style>`,
           picked: true,
         },
diff --git a/addons/cssresources/package.json b/addons/cssresources/package.json
index 7499c9f92965..cdd3afdbf687 100644
--- a/addons/cssresources/package.json
+++ b/addons/cssresources/package.json
@@ -19,13 +19,14 @@
   "license": "MIT",
   "author": "nm123github",
   "main": "dist/index.js",
-  "jsnext:main": "src/index.js",
+  "types": "dist/index.d.ts",
   "scripts": {
     "prepare": "node ../../scripts/prepare.js"
   },
   "dependencies": {
     "@emotion/styled": "10.0.6",
     "@storybook/addons": "5.0.0-alpha.9",
+    "@storybook/channels": "5.0.0-alpha.9",
     "@storybook/components": "5.0.0-alpha.9",
     "@storybook/core-events": "5.0.0-alpha.9",
     "core-js": "^2.6.2",
diff --git a/addons/cssresources/src/CssResource.ts b/addons/cssresources/src/CssResource.ts
new file mode 100644
index 000000000000..0067ca677488
--- /dev/null
+++ b/addons/cssresources/src/CssResource.ts
@@ -0,0 +1,5 @@
+export interface CssResource {
+  id: string;
+  code: string;
+  picked: boolean;
+}
diff --git a/addons/cssresources/src/constants.js b/addons/cssresources/src/constants.ts
similarity index 89%
rename from addons/cssresources/src/constants.js
rename to addons/cssresources/src/constants.ts
index b8422207fb45..1a0f36540353 100644
--- a/addons/cssresources/src/constants.js
+++ b/addons/cssresources/src/constants.ts
@@ -2,7 +2,7 @@ export const ADDON_ID = 'storybook/cssresources';
 export const PANEL_ID = `${ADDON_ID}/panel`;
 export const PARAM_KEY = 'cssresources';
 
-export default {
+export const EVENTS = {
   SET: `${ADDON_ID}:set`,
   UNSET: `${ADDON_ID}:unset`,
 };
diff --git a/addons/cssresources/src/css-resource-panel.js b/addons/cssresources/src/css-resource-panel.tsx
similarity index 52%
rename from addons/cssresources/src/css-resource-panel.js
rename to addons/cssresources/src/css-resource-panel.tsx
index 38150a87a27e..628db155807f 100644
--- a/addons/cssresources/src/css-resource-panel.js
+++ b/addons/cssresources/src/css-resource-panel.tsx
@@ -1,12 +1,30 @@
 import React, { Component, Fragment } from 'react';
-import PropTypes from 'prop-types';
 import { SyntaxHighlighter } from '@storybook/components';
+import events, { STORY_CHANGED } from '@storybook/core-events';
+import { EVENTS, PARAM_KEY } from './constants';
+import { Channel } from '@storybook/channels';
+import { CssResource } from './CssResource';
+import { bool, func, shape } from 'prop-types';
 
-import { STORY_CHANGED } from '@storybook/core-events';
-import EVENTS, { PARAM_KEY } from './constants';
+interface CssResourcePanelProps {
+  active: boolean;
+  channel: Channel;
+  api: {
+    emit: (event: any, data: any) => void;
+    on: (event: events, callback: (data: any) => void) => void;
+    off: (event: events, callback: (data: any) => void) => void;
+    getQueryParam: () => void;
+    getParameters: (id: string, paramKey: string) => any;
+    setQueryParams: () => void;
+  };
+}
+
+interface CssResourcePanelState {
+  list: CssResource[];
+}
 
-export default class CssResourcePanel extends Component {
-  constructor(props) {
+export class CssResourcePanel extends Component<CssResourcePanelProps, CssResourcePanelState> {
+  constructor(props: CssResourcePanelProps) {
     super(props);
 
     this.state = {
@@ -24,9 +42,9 @@ export default class CssResourcePanel extends Component {
     api.off(STORY_CHANGED, this.onStoryChange);
   }
 
-  onStoryChange = id => {
+  onStoryChange = (id: string) => {
     const { api } = this.props;
-    const list = api.getParameters(id, PARAM_KEY);
+    const list = api.getParameters(id, PARAM_KEY) as CssResource[];
 
     if (list) {
       const picked = list.filter(res => res.picked);
@@ -34,16 +52,16 @@ export default class CssResourcePanel extends Component {
     }
   };
 
-  onChange = event => {
+  onChange = (event: any) => {
     const { list: oldList } = this.state;
     const list = oldList.map(i => ({
       ...i,
       picked: i.id === event.target.id ? event.target.checked : i.picked,
     }));
-    this.setState({ list }, () => this.emit(list.filter(res => res.picked)));
+    this.setState({ list }, () => this.emit(list.filter((res: any) => res.picked)));
   };
 
-  emit(list) {
+  emit(list: CssResource[]) {
     const { api } = this.props;
     api.emit(EVENTS.SET, list);
   }
@@ -73,16 +91,16 @@ export default class CssResourcePanel extends Component {
   }
 }
 
-CssResourcePanel.propTypes = {
-  active: PropTypes.bool.isRequired,
-  channel: PropTypes.shape({
-    on: PropTypes.func,
-    emit: PropTypes.func,
-    removeListener: PropTypes.func,
+(CssResourcePanel as any).propTypes = {
+  active: bool.isRequired,
+  channel: shape({
+    on: func,
+    emit: func,
+    removeListener: func,
   }).isRequired,
-  api: PropTypes.shape({
-    on: PropTypes.func,
-    getQueryParam: PropTypes.func,
-    setQueryParams: PropTypes.func,
+  api: shape({
+    on: func,
+    getQueryParam: func,
+    setQueryParams: func,
   }).isRequired,
 };
diff --git a/addons/cssresources/src/index.js b/addons/cssresources/src/index.ts
similarity index 68%
rename from addons/cssresources/src/index.js
rename to addons/cssresources/src/index.ts
index 17532d7df73e..436343c8f449 100644
--- a/addons/cssresources/src/index.js
+++ b/addons/cssresources/src/index.ts
@@ -1,8 +1,8 @@
 import { document } from 'global';
-import addons, { makeDecorator } from '@storybook/addons';
-import EVENTS, { PARAM_KEY } from './constants';
+import { addons, makeDecorator } from '@storybook/addons';
+import { EVENTS, PARAM_KEY } from './constants';
 
-const changeMediaAttribute = (element, enabled) => {
+const changeMediaAttribute = (element: HTMLElement, enabled: boolean) => {
   const current = element.getAttribute('media');
   if ((enabled && !current) || (!enabled && current === 'max-width: 1px')) {
     // don't do anything
@@ -19,29 +19,33 @@ const changeMediaAttribute = (element, enabled) => {
     element.setAttribute('media', value);
   }
 };
-const createElement = (id, code) => {
-  const element = document.createElement('div');
+
+const createElement = (id: string, code: string): HTMLDivElement => {
+  const element: HTMLDivElement = document.createElement('div');
   element.setAttribute('id', `storybook-addon-resource_${id}`);
   element.innerHTML = code;
   return element;
 };
-const getElement = (id, code) => {
-  const found = document.querySelector(`[id="storybook-addon-resource_${id}"]`);
+
+const getElement = (id: string, code: string) => {
+  const found: Element = document.querySelector(`[id="storybook-addon-resource_${id}"]`);
   return { element: found || createElement(id, code), created: !found };
 };
-const updateElement = (id, code, value) => {
+
+const updateElement = (id: string, code: string, value: boolean) => {
   const { element, created } = getElement(id, code);
-  const tags = [...element.querySelectorAll('link'), ...element.querySelectorAll('style')];
 
-  tags.forEach(child => changeMediaAttribute(child, value));
+  element.querySelectorAll('link').forEach(child => changeMediaAttribute(child, value));
+  element.querySelectorAll('style').forEach(child => changeMediaAttribute(child, value));
 
   if (created) {
     document.body.appendChild(element);
   }
 };
 
-const list = [];
-const setResources = resources => {
+const list: any[] = [];
+
+const setResources = (resources: Array<{ code: string; id: string }>) => {
   const added = resources.filter(i => !list.find(r => r.code === i.code));
   const removed = list.filter(i => !resources.find(r => r.code === i.code));
 
@@ -63,7 +67,7 @@ export const withCssResources = makeDecorator({
   skipIfNoParametersOrOptions: true,
   allowDeprecatedUsage: false,
 
-  wrapper: (getStory, context, { options, parameters }) => {
+  wrapper: (getStory: any, context: any, { options, parameters }: any) => {
     const storyOptions = parameters || options;
     addons.getChannel().on(EVENTS.SET, setResources);
 
diff --git a/addons/cssresources/src/register.js b/addons/cssresources/src/register.tsx
similarity index 61%
rename from addons/cssresources/src/register.js
rename to addons/cssresources/src/register.tsx
index 3effb0f6a733..7a8348cc2c0b 100644
--- a/addons/cssresources/src/register.js
+++ b/addons/cssresources/src/register.tsx
@@ -1,18 +1,18 @@
 import React from 'react';
-import addons, { types } from '@storybook/addons';
+import { addons, types } from '@storybook/addons';
 
 import { ADDON_ID, PANEL_ID } from './constants';
-
-import CssResourcePanel from './css-resource-panel';
+import { CssResourcePanel } from './css-resource-panel';
 
 addons.register(ADDON_ID, api => {
   const channel = addons.getChannel();
+  // Need to cast as any as it's not matching Addon type, to investigate
   addons.add(PANEL_ID, {
     type: types.PANEL,
     title: 'CSS resources',
     // eslint-disable-next-line react/prop-types
-    render: ({ active, key }) => (
+    render: ({ active, key }: any) => (
       <CssResourcePanel key={key} channel={channel} api={api} active={active} />
     ),
-  });
+  } as any);
 });
diff --git a/addons/cssresources/src/typings.d.ts b/addons/cssresources/src/typings.d.ts
new file mode 100644
index 000000000000..1cebcd2c971a
--- /dev/null
+++ b/addons/cssresources/src/typings.d.ts
@@ -0,0 +1,3 @@
+// TODO: following packages need definition files or a TS migration
+declare module '@storybook/components';
+declare module 'global';
diff --git a/addons/cssresources/tsconfig.json b/addons/cssresources/tsconfig.json
new file mode 100644
index 000000000000..8876bb6737a1
--- /dev/null
+++ b/addons/cssresources/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "./src",
+    "types": ["webpack-env"]
+  },
+  "include": [
+    "src/**/*"
+  ],
+  "exclude": [
+    "src/__tests__/**/*"
+  ]
+}