diff --git a/lib/error.js b/lib/error.js
index 9d22e9e4..f713ff78 100644
--- a/lib/error.js
+++ b/lib/error.js
@@ -1,4 +1,6 @@
 import React from 'react'
+import PropTypes from 'prop-types'
+import exact from 'prop-types-exact'
 import HTTPStatus from 'http-status'
 import Head from './head'
 
@@ -8,6 +10,10 @@ export default class Error extends React.Component {
     return { statusCode }
   }
 
+  static propTypes = exact({
+    statusCode: PropTypes.number
+  })
+
   render () {
     const { statusCode } = this.props
     const title = statusCode === 404
diff --git a/lib/link.js b/lib/link.js
index 3582fa53..75f0300f 100644
--- a/lib/link.js
+++ b/lib/link.js
@@ -3,6 +3,7 @@
 import { resolve, format, parse } from 'url'
 import React, { Component, Children } from 'react'
 import PropTypes from 'prop-types'
+import exact from 'prop-types-exact'
 import Router, { _rewriteUrlForNextExport } from './router'
 import { warn, execOnce, getLocationOrigin } from './utils'
 
@@ -13,7 +14,8 @@ export default class Link extends Component {
     this.formatUrls(props)
   }
 
-  static propTypes = {
+  static propTypes = exact({
+    href: PropTypes.string,
     prefetch: PropTypes.bool,
     children: PropTypes.oneOfType([
       PropTypes.element,
@@ -29,7 +31,7 @@ export default class Link extends Component {
     ]).isRequired,
     shallow: PropTypes.bool,
     passHref: PropTypes.bool
-  }
+  })
 
   componentWillReceiveProps (nextProps) {
     this.formatUrls(nextProps)
diff --git a/package.json b/package.json
index fa349b4c..77d9b35f 100644
--- a/package.json
+++ b/package.json
@@ -83,6 +83,7 @@
     "path-match": "1.2.4",
     "pkg-up": "2.0.0",
     "prop-types": "15.5.10",
+    "prop-types-exact": "^1.1.1",
     "react-hot-loader": "3.0.0-beta.7",
     "recursive-copy": "^2.0.6",
     "send": "^0.15.3",
diff --git a/yarn.lock b/yarn.lock
index e66e4cae..d28d6a9d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4003,10 +4003,18 @@ object-assign@^4.0.1, object-assign@^4.1.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
 
-object-keys@^1.0.8:
+object-keys@^1.0.10, object-keys@^1.0.8:
   version "1.0.11"
   resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.0.11.tgz#c54601778ad560f1142ce0e01bcca8b56d13426d"
 
+object.assign@^4.0.4:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/object.assign/-/object.assign-4.0.4.tgz#b1c9cc044ef1b9fe63606fc141abbb32e14730cc"
+  dependencies:
+    define-properties "^1.1.2"
+    function-bind "^1.1.0"
+    object-keys "^1.0.10"
+
 object.omit@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/object.omit/-/object.omit-2.0.1.tgz#1a9c744829f39dbb858c76ca3579ae2a54ebd1fa"
@@ -4324,6 +4332,13 @@ promise@^7.0.1, promise@^7.1.1:
   dependencies:
     asap "~2.0.3"
 
+prop-types-exact@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/prop-types-exact/-/prop-types-exact-1.1.1.tgz#c2620207e4f77f9762fa1835b0387a464bd08978"
+  dependencies:
+    has "^1.0.1"
+    object.assign "^4.0.4"
+
 prop-types@15.5.10, prop-types@^15.5.4, prop-types@^15.5.7, prop-types@~15.5.7:
   version "15.5.10"
   resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.5.10.tgz#2797dfc3126182e3a95e3dfbb2e893ddd7456154"