diff --git a/.gitignore b/.gitignore
index eea1ef6..a19dcbb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,4 +23,6 @@ type-detect.test.js
 .nyc_output
 
 index.js
-index.d.ts
+*.d.ts
+
+test/deno-test.js
diff --git a/README.md b/README.md
index 0a58456..c11808f 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 </h1>
 <br>
 <p align=center>
-  Improved typeof detection for <a href="http://nodejs.org">node</a> and the browser.
+  Improved typeof detection for <a href="https://nodejs.org">node</a>, <a href="https://deno.land/">, and the browser.
 </p>
 
 <p align=center>
@@ -102,6 +102,14 @@ Sadly, `Object.prototype.toString` is slow, and buggy. By slow - we mean it is s
 
     $ npm install type-detect
 
+### Deno
+
+`type-detect` can be imported with the following line:
+
+```js
+import typeDetect 'https://raw.githubusercontent.com/chaijs/type-detect/v4.0.8/index.ts'
+```
+
 ### Browsers
 
 You can also use it within the browser; install via npm and use the `type-detect.js` file found within the download. For example:
diff --git a/index.ts b/index.ts
index 1f3ca4b..d257582 100644
--- a/index.ts
+++ b/index.ts
@@ -124,7 +124,7 @@ export default function typeDetect(obj: unknown): string {
      *  - IE <=11 === "[object Object]"
      *  - IE Edge <=13 === "[object Object]"
      */
-    if (typeof window.location === 'object' && obj === window.location) {
+    if (typeof (window as any).location === 'object' && obj === (window as any).location) {
       return 'Location';
     }
 
@@ -147,19 +147,19 @@ export default function typeDetect(obj: unknown): string {
      *  - IE 11 === "[object HTMLDocument]"
      *  - IE Edge <=13 === "[object HTMLDocument]"
      */
-    if (typeof window.document === 'object' && obj === window.document) {
+    if (typeof (window as any).document === 'object' && obj === (window as any).document) {
       return 'Document';
     }
 
-    if (typeof window.navigator === 'object') {
+    if (typeof (window as any).navigator === 'object') {
       /* ! Spec Conformance
        * (https://html.spec.whatwg.org/multipage/webappapis.html#mimetypearray)
        * WhatWG HTML$8.6.1.5 - Plugins - Interface MimeTypeArray
        * Test: `Object.prototype.toString.call(navigator.mimeTypes)``
        *  - IE <=10 === "[object MSMimeTypesCollection]"
        */
-      if (typeof window.navigator.mimeTypes === 'object' &&
-          obj === window.navigator.mimeTypes) {
+      if (typeof (window as any).navigator.mimeTypes === 'object' &&
+          obj === (window as any).navigator.mimeTypes) {
         return 'MimeTypeArray';
       }
 
@@ -169,22 +169,22 @@ export default function typeDetect(obj: unknown): string {
        * Test: `Object.prototype.toString.call(navigator.plugins)``
        *  - IE <=10 === "[object MSPluginsCollection]"
        */
-      if (typeof window.navigator.plugins === 'object' &&
-          obj === window.navigator.plugins) {
+      if (typeof (window as any).navigator.plugins === 'object' &&
+          obj === (window as any).navigator.plugins) {
         return 'PluginArray';
       }
     }
 
-    if ((typeof window.HTMLElement === 'function' ||
-        typeof window.HTMLElement === 'object') &&
-        obj instanceof window.HTMLElement) {
+    if ((typeof (window as any).HTMLElement === 'function' ||
+        typeof (window as any).HTMLElement === 'object') &&
+        obj instanceof (window as any).HTMLElement) {
       /* ! Spec Conformance
       * (https://html.spec.whatwg.org/multipage/webappapis.html#pluginarray)
       * WhatWG HTML$4.4.4 - The `blockquote` element - Interface `HTMLQuoteElement`
       * Test: `Object.prototype.toString.call(document.createElement('blockquote'))``
       *  - IE <=10 === "[object HTMLBlockElement]"
       */
-      if (obj.tagName === 'BLOCKQUOTE') {
+      if ((obj as any).tagName === 'BLOCKQUOTE') {
         return 'HTMLQuoteElement';
       }
 
@@ -200,7 +200,7 @@ export default function typeDetect(obj: unknown): string {
        *  - Firefox === "[object HTMLTableCellElement]"
        *  - Safari === "[object HTMLTableCellElement]"
        */
-      if (obj.tagName === 'TD') {
+      if ((obj as any).tagName === 'TD') {
         return 'HTMLTableDataCellElement';
       }
 
@@ -216,7 +216,7 @@ export default function typeDetect(obj: unknown): string {
        *  - Firefox === "[object HTMLTableCellElement]"
        *  - Safari === "[object HTMLTableCellElement]"
        */
-      if (obj.tagName === 'TH') {
+      if ((obj as any).tagName === 'TH') {
         return 'HTMLTableHeaderCellElement';
       }
     }
diff --git a/package.json b/package.json
index ea5b27b..c27f69b 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,7 @@
     "test": "npm run test:node && npm run test:browser",
     "test:browser": "karma start --singleRun=true",
     "test:node": "nyc mocha type-detect.test.js",
+    "test:deno": "deno test test/deno-test.ts",
     "posttest:node": "nyc report --report-dir \"coverage/node-$(node --version)\" --reporter=lcovonly && npm run upload-coverage",
     "posttest:browser": "npm run upload-coverage",
     "upload-coverage": "codecov"
diff --git a/test/deno-test.ts b/test/deno-test.ts
new file mode 100644
index 0000000..b2666d0
--- /dev/null
+++ b/test/deno-test.ts
@@ -0,0 +1,7 @@
+/* global Deno:readonly */
+// @ts-nocheck
+import { assertEquals } from 'https://deno.land/std/testing/asserts.ts';
+import typeDetect from '../index.ts';
+Deno.test('type detect works', () => {
+  assertEquals(typeDetect('hello'), 'string');
+});