diff --git a/README.md b/README.md
index 63d67490..ab942af8 100644
--- a/README.md
+++ b/README.md
@@ -131,12 +131,12 @@ toBeDisabled()
 This allows you to check whether an element is disabled from the user's
 perspective.
 
-It matches if the element is a form control and the `disabled` attribute is
+It matches if the element has either `aria-disabled` set to `true` or is a form control and the `disabled` attribute is
 specified on this element or the element is a descendant of a form element with
 a `disabled` attribute.
 
 According to the specification, the following elements can be
-[actually disabled](https://html.spec.whatwg.org/multipage/semantics-other.html#disabled-elements):
+[actually disabled](https://html.spec.whatwg.org/multipage/semantics-other.html#disabled-elements) (using `disabled` attribute):
 `button`, `input`, `select`, `textarea`, `optgroup`, `option`, `fieldset`.
 
 #### Examples
diff --git a/package.json b/package.json
index 027ff2fa..c3ce1b2d 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
   },
   "devDependencies": {
     "jest-watch-select-projects": "^0.1.2",
-    "jsdom": "^15.1.0",
+    "jsdom": "^15.1.1",
     "kcd-scripts": "^1.4.0"
   },
   "eslintConfig": {
diff --git a/src/__tests__/to-be-disabled.js b/src/__tests__/to-be-disabled.js
index 74e13e6f..5a19af1b 100644
--- a/src/__tests__/to-be-disabled.js
+++ b/src/__tests__/to-be-disabled.js
@@ -28,6 +28,8 @@ test('.toBeDisabled', () => {
       </fieldset>
 
       <a href="http://github.com" disabled={true} data-testid="a-element">x</a>
+      <a href="http://github.com" aria-disabled="true" data-testid="a-element-aria-disabled">x</a>
+      <a href="http://github.com" aria-disabled="false" data-testid="a-element-aria-disabled-false">x</a>
     </div>
     `)
 
@@ -51,6 +53,9 @@ test('.toBeDisabled', () => {
 
   expect(queryByTestId('a-element')).not.toBeDisabled()
   expect(() => expect(queryByTestId('a-element')).toBeDisabled()).toThrowError()
+
+  expect(queryByTestId('a-element-aria-disabled')).toBeDisabled()
+  expect(queryByTestId('a-element-aria-disabled-false')).not.toBeDisabled()
 })
 
 test('.toBeDisabled fieldset>legend', () => {
@@ -132,6 +137,8 @@ test('.toBeEnabled', () => {
       </fieldset>
 
       <a href="http://github.com" disabled={true} data-testid="a-element">x</a>
+      <a href="http://github.com" aria-disabled="true" data-testid="a-element-aria-disabled">x</a>
+      <a href="http://github.com" aria-disabled="false" data-testid="a-element-aria-disabled-false">x</a>
     </div>
     `)
 
@@ -173,6 +180,9 @@ test('.toBeEnabled', () => {
   expect(() =>
     expect(queryByTestId('a-element')).not.toBeEnabled(),
   ).toThrowError()
+
+  expect(queryByTestId('a-element-aria-disabled')).not.toBeEnabled()
+  expect(queryByTestId('a-element-aria-disabled-false')).toBeEnabled()
 })
 
 test('.toBeEnabled fieldset>legend', () => {
diff --git a/src/to-be-disabled.js b/src/to-be-disabled.js
index 9ba177b5..5fb5fe8d 100644
--- a/src/to-be-disabled.js
+++ b/src/to-be-disabled.js
@@ -41,6 +41,10 @@ function isElementDisabled(element) {
   return FORM_TAGS.includes(getTag(element)) && element.hasAttribute('disabled')
 }
 
+function isAriaDisabled(element) {
+  return element.getAttribute('aria-disabled') === 'true'
+}
+
 function isAncestorDisabled(element) {
   const parent = element.parentElement
   return (
@@ -52,7 +56,10 @@ function isAncestorDisabled(element) {
 export function toBeDisabled(element) {
   checkHtmlElement(element, toBeDisabled, this)
 
-  const isDisabled = isElementDisabled(element) || isAncestorDisabled(element)
+  const isDisabled =
+    isAriaDisabled(element) ||
+    isElementDisabled(element) ||
+    isAncestorDisabled(element)
 
   return {
     pass: isDisabled,
@@ -71,7 +78,11 @@ export function toBeDisabled(element) {
 export function toBeEnabled(element) {
   checkHtmlElement(element, toBeEnabled, this)
 
-  const isEnabled = !(isElementDisabled(element) || isAncestorDisabled(element))
+  const isEnabled = !(
+    isAriaDisabled(element) ||
+    isElementDisabled(element) ||
+    isAncestorDisabled(element)
+  )
 
   return {
     pass: isEnabled,