diff --git a/package.json b/package.json
index 0a5c1597..62b66fe6 100644
--- a/package.json
+++ b/package.json
@@ -26,6 +26,7 @@
     "toolkit"
   ],
   "dependencies": {
+    "@types/prop-types": "^15.5.2",
     "classnames": "^2.2.5",
     "core-js": "^2.4.0",
     "ramda": "^0.23.0",
@@ -95,7 +96,7 @@
     "stylelint": "^7.10.1",
     "stylelint-config-standard": "^16.0.0",
     "stylelint-order": "^0.4.4",
-    "typescript": "^2.1.5",
+    "typescript": "^2.3.0",
     "webpack": "^2.6.0",
     "webpack-dev-middleware": "^1.10.2",
     "webpack-hot-middleware": "^2.18.0"
diff --git a/spec/ts/dialog.tsx b/spec/ts/dialog.tsx
index 44555123..56f6ae69 100644
--- a/spec/ts/dialog.tsx
+++ b/spec/ts/dialog.tsx
@@ -1,4 +1,5 @@
 import * as React from 'react';
+import * as PropTypes from 'prop-types';
 import Button from '../../components/button';
 import Dialog from '../../components/dialog';
 import Dropdown from '../../components/dropdown';
@@ -64,11 +65,11 @@ class DialogTest extends React.Component<any, any> {
 
 class ContextComponent extends React.Component<any, any> {
   static propTypes = {
-    children: React.PropTypes.any,
+    children: PropTypes.any,
   };
 
   static childContextTypes = {
-    message: React.PropTypes.string,
+    message: PropTypes.string,
   }
 
   getChildContext() {
@@ -84,7 +85,7 @@ class ContextComponent extends React.Component<any, any> {
 
 class DialogChild extends React.Component<any, any> {
   static contextTypes = {
-    message: React.PropTypes.string,
+    message: PropTypes.string,
   }
 
   render() {
diff --git a/spec/ts/pickers.tsx b/spec/ts/pickers.tsx
index 2c5fb33f..bd8fc6d9 100644
--- a/spec/ts/pickers.tsx
+++ b/spec/ts/pickers.tsx
@@ -3,8 +3,8 @@ import DatePicker from '../../components/date_picker';
 import TimePicker from '../../components/time_picker';
 
 const datetime = new Date(2015, 10, 16);
-const min_datetime = new Date(new Date(datetime).setDate(8));
-const max_datetime = new Date(new Date(datetime).setDate(24));
+const min_datetime = new Date(new Date(datetime.toString()).setDate(8));
+const max_datetime = new Date(new Date(datetime.toString()).setDate(24));
 datetime.setHours(17);
 datetime.setMinutes(28);
 const today = new Date();
diff --git a/yarn.lock b/yarn.lock
index e801fecc..09bdd0ba 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10,6 +10,10 @@
   version "7.0.4"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-7.0.4.tgz#9aabc135979ded383325749f508894c662948c8b"
 
+"@types/prop-types@^15.5.2":
+  version "15.5.2"
+  resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.5.2.tgz#3c6b8dceb2906cc87fe4358e809f9d20c8d59be1"
+
 "@types/react@^16.0.7":
   version "16.0.38"
   resolved "https://registry.yarnpkg.com/@types/react/-/react-16.0.38.tgz#76617433ea10274505f60bb86eddfdd0476ffdc2"
@@ -7350,9 +7354,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@^2.1.5:
-  version "2.1.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.1.5.tgz#6fe9479e00e01855247cea216e7561bafcdbcd4a"
+typescript@^2.3.0:
+  version "2.7.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.2.tgz#2d615a1ef4aee4f574425cdff7026edf81919836"
 
 ua-parser-js@^0.7.9:
   version "0.7.12"