diff --git a/package.json b/package.json
index 40ebaf4..388d861 100644
--- a/package.json
+++ b/package.json
@@ -24,11 +24,14 @@
   ],
   "author": "James Kyle <me@thejameskyle.com>",
   "license": "BSD-3-Clause",
+  "peerDependencies": {
+    "react": "^0.14.9 || ^15.0.0-0 || ^16.0.0-0"
+  },
   "dependencies": {
     "a11y-focus-scope": "^1.1.0",
     "a11y-focus-store": "^1.0.0",
     "exenv": "^1.2.0",
-    "react": "^0.14.2 || ^15.0.0"
+    "prop-types": "^15.5.8"
   },
   "devDependencies": {
     "babel-cli": "^6.1.1",
@@ -60,6 +63,7 @@
     "karma-tape-reporter": "^1.0.3",
     "minimist": "^1.2.0",
     "mocha": "^2.3.3",
+    "react": "^15.5.4",
     "react-addons-css-transition-group": "^15.0.0",
     "react-addons-test-utils": "^15.0.0",
     "react-dom": "^15.0.0",
diff --git a/src/Modal.js b/src/Modal.js
index b356f78..6536487 100644
--- a/src/Modal.js
+++ b/src/Modal.js
@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import focusScope from 'a11y-focus-scope';
 import focusStore from 'a11y-focus-store';
 import ExecutionEnvironment from 'exenv';
@@ -21,16 +22,16 @@ export default class ReactModal2 extends React.Component {
   }
 
   static propTypes = {
-    onClose: React.PropTypes.func.isRequired,
+    onClose: PropTypes.func.isRequired,
 
-    closeOnEsc: React.PropTypes.bool,
-    closeOnBackdropClick: React.PropTypes.bool,
+    closeOnEsc: PropTypes.bool,
+    closeOnBackdropClick: PropTypes.bool,
 
-    backdropClassName: React.PropTypes.string,
-    backdropStyles: React.PropTypes.object,
+    backdropClassName: PropTypes.string,
+    backdropStyles: PropTypes.object,
 
-    modalClassName: React.PropTypes.string,
-    modalStyles: React.PropTypes.object
+    modalClassName: PropTypes.string,
+    modalStyles: PropTypes.object
   };
 
   static defaultProps = {