diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..b43d40b
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,52 @@
+/**
+ * EvEmitter
+ *
+ * Adds publish/subscribe pattern to a browser class. It's a smaller
+ * version of [olical/EventEmitter](https://github.com/Olical/EventEmitter).
+ * That EventEmitter is full featured, widely used, and great.
+ * This EvEmitter has just the base event functionality to power the event API
+ * in libraries like [isotope](https://isotope.metafizzy.co/),
+ * [flickity](https://flickity.metafizzy.co/), [masonry](https://masonry.desandro.com/),
+ * and [imagesLoaded](https://imagesloaded.desandro.com/).
+ */
+declare module "ev-emitter" {
+  /**
+   * EvEmitter
+   *
+   * Lil' event emitter — Add a little pub/sub
+   */
+  export default class EvEmitter {
+    /**
+     * Add an event listener.
+     *
+     * @param {eventName} eventName Name of the event
+     * @param {listener} listener Function to trigger
+     */
+    on(eventName: string, listener: Function): this;
+    /**
+     * Add an event listener to be triggered only once.
+     *
+     * @param {eventName} eventName Name of the event
+     * @param {listener} listener Function to trigger
+     */
+    once(eventName: string, listener: Function): this;
+    /**
+     * Remove an event listener.
+     *
+     * @param {eventName} eventName Name of the event
+     * @param {listener} listener Function to trigger
+     */
+    off(eventName: string, listener: Function): this;
+    /**
+     * Trigger an event.
+     *
+     * @param {eventName} eventName Name of the event
+     * @param {args} args Arguments passed to listeners
+     */
+    emitEvent(eventName: string, args?: any[]): this;
+    /**
+     * Removes all event listeners.
+     */
+    allOff(): this;
+  }
+}
diff --git a/package.json b/package.json
index 3ed9ed3..65c406a 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "2.1.2",
   "description": "lil' event emitter",
   "main": "ev-emitter.js",
+  "types": "index.d.ts",
   "devDependencies": {
     "ava": "^3.15.0",
     "eslint": "^7.30.0",