diff --git a/.gitignore b/.gitignore
index 1d57ba1..77dcfc5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 .idea/
 
 node_modules/
+package-lock.json
diff --git a/README.md b/README.md
index 48adfdb..3a7a61d 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ Therefore, you need to install the CometD JavaScript Client, version 3.1.2 or gr
 npm install cometd
 ```
 
-### Usage
+### Usage (CommonJS)
 
 ```javascript
 // Run the adapter code that implements XMLHttpRequest.
@@ -38,4 +38,16 @@ var cometd = new lib.CometD();
 ...
 ```
 
+### Usage (ES Modules)
+
+```javascript
+import { CometD } from 'cometd';
+import { adapt } from 'cometd-nodejs-client';
+// Shim XMLHTTPRequest for Node.js (required by CometD).
+adapt();
+
+// Your normal CometD client application here.
+const client = new CometD();
+```
+
 See [here](https://github.com/cometd/cometd-javascript/blob/master/README.md) for an example CometD client application.
diff --git a/cometd-nodejs-client.d.ts b/cometd-nodejs-client.d.ts
new file mode 100644
index 0000000..e172e03
--- /dev/null
+++ b/cometd-nodejs-client.d.ts
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2017-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+export interface HttpProxy {
+  uri?: string;
+  includes?: string[];
+  excludes?: string[];
+}
+
+export interface Options {
+  logLevel?: "debug" | "info";
+  httpProxy?: HttpProxy;
+}
+
+export function adapt(options?: Options): void;
diff --git a/package.json b/package.json
index f12d787..4c26028 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
   },
   "license": "Apache-2.0",
   "main": "cometd-nodejs-client.js",
+  "types": "cometd-nodejs-client.d.ts",
   "repository": {
     "type": "git",
     "url": "https://github.com/cometd/cometd-nodejs-client.git"