diff --git a/src/client.js b/src/client.js
index acf5331fb..99bde3878 100644
--- a/src/client.js
+++ b/src/client.js
@@ -1164,13 +1164,17 @@ export class StreamChat {
 	/** muteUser - mutes a user
 	 *
 	 * @param targetID
-	 * @param [userID] Only used with serverside auth
+	 * @param options
 	 * @returns {Promise<*>}
 	 */
-	async muteUser(targetID, userID = null) {
+	async muteUser(targetID, options) {
+		// WARNING: this is a backwards incompatible change
+		const userID = options ? options.userID : undefined;
+		const timeout = options ? options.timeout : undefined;
 		return await this.post(this.baseURL + '/moderation/mute', {
 			target_id: targetID,
 			...(userID ? { user_id: userID } : {}),
+			...(timeout ? { timeout } : {}),
 		});
 	}
 
diff --git a/types/stream-chat/index.d.ts b/types/stream-chat/index.d.ts
index bf543ad8d..27a874392 100644
--- a/types/stream-chat/index.d.ts
+++ b/types/stream-chat/index.d.ts
@@ -295,7 +295,7 @@ export class StreamChat {
   banUser(targetUserID: string, options: object): Promise<BanUserAPIResponse>;
   unbanUser(targetUserID: string, options: object): Promise<UnbanUserAPIResponse>;
 
-  muteUser(targetUserID: string): Promise<MuteAPIResponse>;
+  muteUser(targetUserID: string, options?: object): Promise<MuteAPIResponse>;
   unmuteUser(targetUserID: string): Promise<UnmuteAPIResponse>;
 
   flagUser(userID: string, options?: object): Promise<FlagAPIResponse>;