diff --git a/lib/api/package.json b/lib/api/package.json
index 4973b2637428..fcc535eede51 100644
--- a/lib/api/package.json
+++ b/lib/api/package.json
@@ -39,7 +39,6 @@
     "global": "^4.3.2",
     "lodash": "^4.17.15",
     "memoizerific": "^1.11.3",
-    "prop-types": "^15.6.2",
     "react": "^16.8.3",
     "semver": "^6.0.0",
     "shallow-equal": "^1.1.0",
diff --git a/lib/components/package.json b/lib/components/package.json
index 7dffc46c4d1d..8ea1820c2312 100644
--- a/lib/components/package.json
+++ b/lib/components/package.json
@@ -37,7 +37,6 @@
     "memoizerific": "^1.11.3",
     "polished": "^3.4.4",
     "popper.js": "^1.14.7",
-    "prop-types": "^15.7.2",
     "react": "^16.8.3",
     "react-dom": "^16.8.3",
     "react-focus-lock": "^2.1.0",
diff --git a/lib/components/src/tabs/tabs.tsx b/lib/components/src/tabs/tabs.tsx
index c4a743ba5883..3ccfc3ad4552 100644
--- a/lib/components/src/tabs/tabs.tsx
+++ b/lib/components/src/tabs/tabs.tsx
@@ -7,7 +7,6 @@ import React, {
   MouseEvent,
   ReactNode,
 } from 'react';
-import PropTypes from 'prop-types';
 import { styled } from '@storybook/theming';
 
 import { Placeholder } from '../placeholder/placeholder';
diff --git a/lib/source-loader/package.json b/lib/source-loader/package.json
index 97a7ed458398..d25616e93f4e 100644
--- a/lib/source-loader/package.json
+++ b/lib/source-loader/package.json
@@ -36,7 +36,6 @@
     "global": "^4.3.2",
     "loader-utils": "^1.2.3",
     "prettier": "^1.16.4",
-    "prop-types": "^15.7.2",
     "regenerator-runtime": "^0.13.3"
   },
   "peerDependencies": {
diff --git a/lib/theming/package.json b/lib/theming/package.json
index 7afdf558e8b0..6107fd7104ff 100644
--- a/lib/theming/package.json
+++ b/lib/theming/package.json
@@ -37,7 +37,6 @@
     "global": "^4.3.2",
     "memoizerific": "^1.11.3",
     "polished": "^3.4.4",
-    "prop-types": "^15.7.2",
     "resolve-from": "^5.0.0",
     "ts-dedent": "^1.1.1"
   },
diff --git a/lib/ui/package.json b/lib/ui/package.json
index a5caf4554126..9bf072771172 100644
--- a/lib/ui/package.json
+++ b/lib/ui/package.json
@@ -48,7 +48,6 @@
     "markdown-to-jsx": "^6.9.3",
     "memoizerific": "^1.11.3",
     "polished": "^3.4.4",
-    "prop-types": "^15.7.2",
     "qs": "^6.6.0",
     "react": "^16.8.3",
     "react-dom": "^16.8.3",
diff --git a/lib/ui/paths.js b/lib/ui/paths.js
index e14bef875a3a..935886acba6c 100644
--- a/lib/ui/paths.js
+++ b/lib/ui/paths.js
@@ -14,7 +14,6 @@ module.exports = {
   '@storybook/router': dirname(resolve('@storybook/router/package.json')),
   '@storybook/theming': dirname(resolve('@storybook/theming/package.json')),
   '@storybook/ui': dirname(resolve('@storybook/ui/package.json')),
-  'prop-types': dirname(resolve('prop-types/package.json')),
   react: dirname(resolve('react/package.json')),
   'react-dom': dirname(resolve('react-dom/package.json')),
 };
diff --git a/lib/ui/scripts/createDlls.js b/lib/ui/scripts/createDlls.js
index 10453bf29277..60735f1e1dd7 100644
--- a/lib/ui/scripts/createDlls.js
+++ b/lib/ui/scripts/createDlls.js
@@ -29,7 +29,6 @@ const run = () =>
           '@storybook/theming',
           'airbnb-js-shims',
           'emotion-theming',
-          'prop-types',
           'react',
           'react-dom',
           'regenerator-runtime/runtime',
diff --git a/lib/ui/src/components/sidebar/SidebarStories.tsx b/lib/ui/src/components/sidebar/SidebarStories.tsx
index f98111dc22bb..b16afec2099e 100644
--- a/lib/ui/src/components/sidebar/SidebarStories.tsx
+++ b/lib/ui/src/components/sidebar/SidebarStories.tsx
@@ -1,5 +1,4 @@
 import React, { Fragment, FunctionComponent, memo } from 'react';
-import PropTypes from 'prop-types';
 
 import { styled } from '@storybook/theming';
 import { Placeholder, Link as StyledLink } from '@storybook/components';
@@ -19,10 +18,6 @@ const Subheading = styled(SidebarSubheading)({
   margin: '0 20px',
 });
 
-Subheading.propTypes = {
-  className: PropTypes.string,
-};
-
 Subheading.defaultProps = {
   className: 'sidebar-subheading',
 };