diff --git a/package.json b/package.json
index 7d190e4..edfecb2 100644
--- a/package.json
+++ b/package.json
@@ -58,11 +58,12 @@
     "webpack-hot-middleware": "^2.12.2"
   },
   "peerDependencies": {
-    "react": "^15.3.0",
-    "react-dom": "^15.3.0"
+    "react": "15-16",
+    "react-dom": "15-16"
   },
   "dependencies": {
-    "react-portal": "^3.0.0"
+    "prop-types": "^15.6.0",
+    "react-portal": "^4.1.2"
   },
   "nyc": {
     "sourceMap": false,
diff --git a/src/components/OverlayTrigger.js b/src/components/OverlayTrigger.js
index 59c252b..2a08525 100644
--- a/src/components/OverlayTrigger.js
+++ b/src/components/OverlayTrigger.js
@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import { uniqueId } from '../utils';
 
 class OverlayTrigger extends React.Component {
@@ -130,12 +131,12 @@ class OverlayTrigger extends React.Component {
 }
 
 OverlayTrigger.propTypes = {
-  closeOnScroll: React.PropTypes.bool,
-  children: React.PropTypes.element.isRequired,
-  overlay: React.PropTypes.object.isRequired,
-  hideLabel: React.PropTypes.string,
-  showLabel: React.PropTypes.string,
-  label: React.PropTypes.string,
+  closeOnScroll: PropTypes.bool,
+  children: PropTypes.element.isRequired,
+  overlay: PropTypes.object.isRequired,
+  hideLabel: PropTypes.string,
+  showLabel: PropTypes.string,
+  label: PropTypes.string,
 };
 
 export default OverlayTrigger;
diff --git a/src/components/PositionProvider.js b/src/components/PositionProvider.js
index 74bbdd1..a3b1215 100644
--- a/src/components/PositionProvider.js
+++ b/src/components/PositionProvider.js
@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import ToolTipArrow from './ToolTipArrow';
 
 import { DEFAULT_ARROW_MARGIN, POSITION, SIZE, BOUNDARY, CLASSES } from '../constants';
@@ -297,17 +298,17 @@ class PositionProvider extends React.Component {
 }
 
 PositionProvider.propTypes = {
-  children: React.PropTypes.node,
-  target: React.PropTypes.object,
-  options: React.PropTypes.object,
-  position: React.PropTypes.string,
-  label: React.PropTypes.string,
-  id: React.PropTypes.string,
-  arrowSize: React.PropTypes.number,
-  arrowOffset: React.PropTypes.number,
-  boundary: React.PropTypes.number,
-  classes: React.PropTypes.string,
-  style: React.PropTypes.object,
+  children: PropTypes.node,
+  target: PropTypes.object,
+  options: PropTypes.object,
+  position: PropTypes.string,
+  label: PropTypes.string,
+  id: PropTypes.string,
+  arrowSize: PropTypes.number,
+  arrowOffset: PropTypes.number,
+  boundary: PropTypes.number,
+  classes: PropTypes.string,
+  style: PropTypes.object,
 };
 
 export default PositionProvider;
diff --git a/src/components/ToolTip.js b/src/components/ToolTip.js
index 48a4a9b..8bd83b7 100644
--- a/src/components/ToolTip.js
+++ b/src/components/ToolTip.js
@@ -1,5 +1,6 @@
 import React from 'react';
-import Portal from 'react-portal';
+import PropTypes from 'prop-types';
+import { Portal } from 'react-portal';
 
 import PositionProvider from './PositionProvider';
 
@@ -61,17 +62,17 @@ const ToolTip = (props) => {
 };
 
 ToolTip.propTypes = {
-  isOpened: React.PropTypes.bool,
-  readonly: React.PropTypes.bool,
-  small: React.PropTypes.bool,
-  onClose: React.PropTypes.func,
-  trigger: React.PropTypes.object,
-  id: React.PropTypes.string,
-  children: React.PropTypes.node,
-  label: React.PropTypes.string,
-  position: React.PropTypes.string,
-  size: React.PropTypes.number,
-  options: React.PropTypes.object,
+  isOpened: PropTypes.bool,
+  readonly: PropTypes.bool,
+  small: PropTypes.bool,
+  onClose: PropTypes.func,
+  trigger: PropTypes.object,
+  id: PropTypes.string,
+  children: PropTypes.node,
+  label: PropTypes.string,
+  position: PropTypes.string,
+  size: PropTypes.number,
+  options: PropTypes.object,
 };
 
 export default ToolTip;
diff --git a/src/components/ToolTipArrow.js b/src/components/ToolTipArrow.js
index d282bcf..e10e59c 100644
--- a/src/components/ToolTipArrow.js
+++ b/src/components/ToolTipArrow.js
@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import { capitalize } from '../utils';
 import { POSITION } from '../constants';
 
@@ -49,8 +50,8 @@ const ToolTipArrow = (props) => {
 };
 
 ToolTipArrow.propTypes = {
-  options: React.PropTypes.object,
-  foreground: React.PropTypes.bool,
+  options: PropTypes.object,
+  foreground: PropTypes.bool,
 };
 
 export default ToolTipArrow;