diff --git a/package-lock.json b/package-lock.json
index 09f12ea18a7..a3aa4b8a1bb 100644
--- a/package-lock.json
+++ b/package-lock.json
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           "version": "1.1.0",
-          "resolved": "http://registry.npmjs.org/load-json-file/-/load-json-file-1.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-1.1.0.tgz",
           "integrity": "sha1-lWkFcI1YtLq0wiYbBPWfMcmTdMA=",
           "dev": true,
           "requires": {
@@ -12957,7 +12956,7 @@
         },
         "os-locale": {
           "version": "1.4.0",
-          "resolved": "http://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz",
+          "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz",
           "integrity": "sha1-IPnxeuKe00XoveWDsT0gCYA8FNk=",
           "dev": true,
           "requires": {
@@ -13243,7 +13242,7 @@
     },
     "sha.js": {
       "version": "2.4.11",
-      "resolved": "http://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
+      "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
       "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
       "dev": true,
       "requires": {
@@ -13669,7 +13668,7 @@
         },
         "readable-stream": {
           "version": "2.3.6",
-          "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
           "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
           "dev": true,
           "requires": {
@@ -13717,7 +13716,7 @@
         },
         "readable-stream": {
           "version": "2.3.6",
-          "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
           "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
           "dev": true,
           "requires": {
@@ -13772,7 +13771,7 @@
         },
         "readable-stream": {
           "version": "2.3.6",
-          "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
           "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
           "dev": true,
           "requires": {
@@ -14113,7 +14112,7 @@
       "dependencies": {
         "rimraf": {
           "version": "2.2.8",
-          "resolved": "http://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
+          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
           "integrity": "sha1-5Dm+Kq7jJzIZUnMPmaiSnk/FBYI=",
           "dev": true
         }
@@ -14320,7 +14319,7 @@
         },
         "load-json-file": {
           "version": "1.1.0",
-          "resolved": "http://registry.npmjs.org/load-json-file/-/load-json-file-1.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-1.1.0.tgz",
           "integrity": "sha1-lWkFcI1YtLq0wiYbBPWfMcmTdMA=",
           "dev": true,
           "requires": {
@@ -14409,7 +14408,7 @@
     },
     "through": {
       "version": "2.3.8",
-      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
       "dev": true
     },
@@ -15522,7 +15521,7 @@
         },
         "table": {
           "version": "4.0.3",
-          "resolved": "http://registry.npmjs.org/table/-/table-4.0.3.tgz",
+          "resolved": "https://registry.npmjs.org/table/-/table-4.0.3.tgz",
           "integrity": "sha512-S7rnFITmBH1EnyKcvxBh1LjYeQMmnZtCXSEbHcH6S0NoKit24ZuFO/T1vDcLdYsLQkM188PVVhQmzKIuThNkKg==",
           "dev": true,
           "requires": {
@@ -15620,7 +15619,7 @@
     },
     "wrap-ansi": {
       "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "dev": true,
       "requires": {
@@ -15751,7 +15750,7 @@
     },
     "yargs": {
       "version": "11.1.0",
-      "resolved": "http://registry.npmjs.org/yargs/-/yargs-11.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-11.1.0.tgz",
       "integrity": "sha512-NwW69J42EsCSanF8kyn5upxvjp5ds+t3+udGBeTbFnERA+lF541DDpMawzo4z6W/QrzNM18D+BPMiOBibnFV5A==",
       "dev": true,
       "requires": {
diff --git a/package.json b/package.json
index 633be7f8acc..d40a17e5c34 100644
--- a/package.json
+++ b/package.json
@@ -52,6 +52,7 @@
     "react": "^16.8.0",
     "react-bodymovin": "2.0.0",
     "react-dom": "^16.8.1",
+    "react-is": "16.8.6",
     "styled-system": "5.0.5"
   },
   "devDependencies": {
diff --git a/pages/components/docs/Link.md b/pages/components/docs/Link.md
index 77635ac7e85..123f403d28c 100644
--- a/pages/components/docs/Link.md
+++ b/pages/components/docs/Link.md
@@ -4,6 +4,8 @@ The Link component styles anchor tags with default blue styling and hover text d
 
 In special cases where you'd like a `<button>` styled like a `Link`, use `<Link as='button'>`. Make sure to provide a click handler with `onClick`.
 
+**Important:** When using the `as` prop, be sure to always render an accessible element type, like `a`, `button`, `input`, or `summary`.
+
 ## Default example
 
 ```.jsx
@@ -16,10 +18,10 @@ Link components get `COMMON` and `TYPOGRAPHY` system props. Read our [System Pro
 
 ## Component props
 
-| Name | Type | Default | Description |
-| :- | :- | :-: | :- |
-| href | String | | URL to be used for the Link |
-| underline | Boolean | false | Adds underline to the Link |
-| as | String | 'a' | Can be 'a', 'button', 'input', or 'summary'
+| Name      | Type    | Default | Description                                 |
+| :-------- | :------ | :-----: | :------------------------------------------ |
+| href      | String  |         | URL to be used for the Link                 |
+| underline | Boolean |  false  | Adds underline to the Link                  |
+| as        | String  |   'a'   | Can be 'a', 'button', 'input', or 'summary' |
 
 export const meta = {displayName: 'Link'}
diff --git a/src/Link.js b/src/Link.js
index c086914faec..14046bd32e6 100644
--- a/src/Link.js
+++ b/src/Link.js
@@ -1,8 +1,9 @@
 import PropTypes from 'prop-types'
 import styled from 'styled-components'
-import {TYPOGRAPHY, COMMON} from './constants'
-import theme from './theme'
 import {system} from 'styled-system'
+import {COMMON, TYPOGRAPHY} from './constants'
+import theme from './theme'
+import elementType from './utils/elementType'
 
 const buttonStyles = {
   display: 'inline-block',
@@ -29,7 +30,7 @@ const Link = styled.a`
     text-decoration: underline;
     ${hoverColor};
   }
-  ${props => (props.is === 'button' ? buttonStyles : '')};
+  ${props => (props.as === 'button' ? buttonStyles : '')};
   ${TYPOGRAPHY} ${COMMON};
 `
 
@@ -39,7 +40,7 @@ Link.defaultProps = {
 }
 
 Link.propTypes = {
-  as: PropTypes.oneOf(['a', 'button', 'input', 'summary']),
+  as: elementType,
   href: PropTypes.string,
   theme: PropTypes.object,
   underline: PropTypes.bool,
diff --git a/src/__tests__/Link.js b/src/__tests__/Link.js
index fe88b342b40..fefb70e7784 100644
--- a/src/__tests__/Link.js
+++ b/src/__tests__/Link.js
@@ -26,6 +26,14 @@ describe('Link', () => {
     expect(render(<Link as="button" />).type).toEqual('button')
   })
 
+  it('respects the "as" prop with non-string component types', () => {
+    function ExampleLink({children}) {
+      return <a className="example-link">{children}</a>
+    }
+
+    expect(render(<Link as={ExampleLink}>Example</Link>)).toMatchSnapshot()
+  })
+
   it('respects hoverColor prop', () => {
     expect(render(<Link hoverColor="blue.4" />)).toMatchSnapshot()
   })
@@ -34,4 +42,8 @@ describe('Link', () => {
     expect(render(<Link fontStyle="italic" />)).toHaveStyleRule('font-style', 'italic')
     expect(render(<Link as="i" fontStyle="normal" />)).toHaveStyleRule('font-style', 'normal')
   })
+
+  it('applies button styles when rendering a button element', () => {
+    expect(render(<Link as="button" />)).toMatchSnapshot()
+  })
 })
diff --git a/src/__tests__/__snapshots__/Link.js.snap b/src/__tests__/__snapshots__/Link.js.snap
index 642911e0b2a..2357aa3f21b 100644
--- a/src/__tests__/__snapshots__/Link.js.snap
+++ b/src/__tests__/__snapshots__/Link.js.snap
@@ -1,5 +1,37 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`Link applies button styles when rendering a button element 1`] = `
+.c0 {
+  -webkit-text-decoration: none;
+  text-decoration: none;
+  display: inline-block;
+  padding: 0;
+  font-size: inherit;
+  white-space: nowrap;
+  cursor: pointer;
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none;
+  background-color: transparent;
+  border: 0;
+  -webkit-appearance: none;
+  -moz-appearance: none;
+  appearance: none;
+  color: #0366d6;
+}
+
+.c0:hover {
+  -webkit-text-decoration: underline;
+  text-decoration: underline;
+}
+
+<button
+  className="c0"
+  color="blue.5"
+/>
+`;
+
 exports[`Link passes href down to link element 1`] = `
 .c0 {
   -webkit-text-decoration: none;
@@ -55,3 +87,11 @@ exports[`Link respects hoverColor prop 1`] = `
   color="blue.5"
 />
 `;
+
+exports[`Link respects the "as" prop with non-string component types 1`] = `
+<a
+  className="example-link"
+>
+  Example
+</a>
+`;
diff --git a/src/utils/elementType.js b/src/utils/elementType.js
new file mode 100644
index 00000000000..a4e72c3581a
--- /dev/null
+++ b/src/utils/elementType.js
@@ -0,0 +1,14 @@
+import {isValidElementType} from 'react-is'
+
+// This function is a temporary workaround until we can get
+// the official PropTypes.elementType working (https://git.io/fjMLX).
+// PropTypes.elementType is currently `undefined` in the browser.
+function elementType(props, propName, componentName) {
+  if (props[propName] && !isValidElementType(props[propName])) {
+    return new Error(
+      `Invalid prop '${propName}' supplied to '${componentName}': the prop is not a valid React component`
+    )
+  }
+}
+
+export default elementType