diff --git a/package.json b/package.json
index adf6fcd..0b1ac19 100644
--- a/package.json
+++ b/package.json
@@ -40,6 +40,7 @@
     "less": "^2.7.2",
     "live-server": "^1.2.0",
     "mocha": "^3.2.0",
+    "prop-types": "^15.7.1",
     "react": "^15.4.2",
     "react-dom": "^15.4.2"
   },
diff --git a/src/NPSInput.js b/src/NPSInput.js
index 3af26be..31705cd 100644
--- a/src/NPSInput.js
+++ b/src/NPSInput.js
@@ -1,4 +1,5 @@
 const React = require('react');
+const PropTypes = require('prop-types');
 const classNames = require('classnames');
 const NPSScale = require('./NPSScale');
 
@@ -8,11 +9,11 @@ const NPSScale = require('./NPSScale');
  */
 const NPSInput = React.createClass({
     propTypes: {
-        animated:    React.PropTypes.bool,
-        service:     React.PropTypes.string,
-        onSubmit:    React.PropTypes.func.isRequired,
-        onDismissed: React.PropTypes.func.isRequired,
-        children:    React.PropTypes.func
+        animated:    PropTypes.bool,
+        service:     PropTypes.string,
+        onSubmit:    PropTypes.func.isRequired,
+        onDismissed: PropTypes.func.isRequired,
+        children:    PropTypes.func
     },
 
     getDefaultProps() {
diff --git a/src/NPSScale.js b/src/NPSScale.js
index afb2efd..5504c27 100644
--- a/src/NPSScale.js
+++ b/src/NPSScale.js
@@ -1,4 +1,5 @@
 const React = require('react');
+const PropTypes = require('prop-types');
 const classNames = require('classnames');
 
 const MIN = 0;
@@ -10,7 +11,7 @@ const MAX = 10;
  */
 const NPSScale = React.createClass({
     propTypes: {
-        onSubmit: React.PropTypes.func.isRequired
+        onSubmit: PropTypes.func.isRequired
     },
 
     getDefaultProps() {
diff --git a/yarn.lock b/yarn.lock
index d66b36a..b3945d3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2766,6 +2766,10 @@ object-assign@^4.0.0, object-assign@^4.0.1, object-assign@^4.1.0, object-assign@
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.0.tgz#7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0"
 
+object-assign@^4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
+
 object-keys@^1.0.8:
   version "1.0.11"
   resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.0.11.tgz#c54601778ad560f1142ce0e01bcca8b56d13426d"
@@ -2968,6 +2972,13 @@ promise@^7.1.1:
   dependencies:
     asap "~2.0.3"
 
+prop-types@^15.7.1:
+  version "15.7.1"
+  resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.7.1.tgz#2fa61e0a699d428b40320127733ee2931f05d9d1"
+  dependencies:
+    object-assign "^4.1.1"
+    react-is "^16.8.1"
+
 proxy-middleware@latest:
   version "0.15.0"
   resolved "https://registry.yarnpkg.com/proxy-middleware/-/proxy-middleware-0.15.0.tgz#a3fdf1befb730f951965872ac2f6074c61477a56"
@@ -3061,6 +3072,10 @@ react-dom@^15.4.2:
     loose-envify "^1.1.0"
     object-assign "^4.1.0"
 
+react-is@^16.8.1:
+  version "16.8.1"
+  resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.8.1.tgz#a80141e246eb894824fb4f2901c0c50ef31d4cdb"
+
 react@^15.4.2:
   version "15.4.2"
   resolved "https://registry.yarnpkg.com/react/-/react-15.4.2.tgz#41f7991b26185392ba9bae96c8889e7e018397ef"