diff --git a/src/index.test.ts b/src/index.test.ts
index da2b39e6..a63faff3 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -45,8 +45,8 @@ test.each([
     "https://example.com/js?callback=__googleMapsCallback",
   ],
   [
-    { channel: "foo" },
-    "https://maps.googleapis.com/maps/api/js?callback=__googleMapsCallback&channel=foo",
+    { client: "bar", channel: "foo" },
+    "https://maps.googleapis.com/maps/api/js?callback=__googleMapsCallback&channel=foo&client=bar",
   ],
 ])("createUrl is correct", (options: LoaderOptions, expected: string) => {
   const loader = new Loader(options);
diff --git a/src/index.ts b/src/index.ts
index 59f31373..7407b5bf 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -42,32 +42,13 @@ export interface LoaderOptions {
    */
   apiKey: string;
   /**
-   * To track usage across different applications using the same client ID,
-   * you may provide an optional channel parameter with your requests. By
-   * specifying different channel values for different aspects of your
-   * application, you can determine precisely how your application is used.
-   *
-   * For example, your externally-facing website may access the API using a
-   * channel set to customer while your internal marketing department may use
-   * a channel set to mkting. Your reports will break down usage by those
-   * channel values.
-   *
-   * Channel reporting is available for applications using the Maps JavaScript
-   * API, the image APIs or any of the Google Maps Platform web services.
-   *
-   * The channel parameter must use the following format:
-   *
-   * - Must be an ASCII alphanumeric string.
-   * - Period (.), underscore (_) and hyphen (-) characters are allowed.
-   * - The channel parameter is case-insensitive; upper-case, mixed-case, and
-   *   lower-cased channel parameters will be merged into their lower-case
-   *   equivalent. For example, usage on the `CUSTOMER` channel will be combined
-   *   with the usage on the `customer` channel.
-   * - The channel value must be a static value assigned per application
-   *   instance, and must not be generated dynamically. You may not use
-   *   channel values to track individual users, for example.
+  * @deprecated See https://developers.google.com/maps/premium/overview.
    */
   channel?: string;
+  /**
+   * @deprecated See https://developers.google.com/maps/premium/overview, use `apiKey` instead.
+   */
+  client?: string;
   /**
    * In your application you can specify release channels or version numbers:
    *
@@ -205,11 +186,15 @@ export class Loader {
    */
   apiKey: string;
   /**
-   * See [[LoaderOptions.id]]
+   * See [[LoaderOptions.channel]]
    */
   channel: string;
   /**
-   * See [[LoaderOptions.channel]]
+   * See [[LoaderOptions.client]]
+   */
+  client: string;
+  /**
+   * See [[LoaderOptions.id]]
    */
   id: string;
   /**
@@ -259,6 +244,7 @@ export class Loader {
   constructor({
     apiKey,
     channel,
+    client,
     id = "__googleMapsScriptId",
     libraries = [],
     language,
@@ -271,6 +257,7 @@ export class Loader {
     this.version = version;
     this.apiKey = apiKey;
     this.channel = channel;
+    this.client = client;
     this.id = id;
     this.libraries = libraries;
     this.language = language;
@@ -297,6 +284,10 @@ export class Loader {
       url += `&channel=${this.channel}`;
     }
 
+    if (this.client) {
+      url += `&client=${this.client}`;
+    }
+
     if (this.libraries.length > 0) {
       url += `&libraries=${this.libraries.join(",")}`;
     }