diff --git a/api.ts b/api.ts
index 1de2736..d9bae1a 100644
--- a/api.ts
+++ b/api.ts
@@ -3398,6 +3398,13 @@ export interface Call {
    * @maxLength 40
    */
   name?: string;
+
+  /**
+   * This is the URL of the call that the assistant will join.
+   *
+   * Only relevant for `webCall` type.
+   */
+  webCallUrl?: string;
 }
 
 export interface PaginationMeta {
diff --git a/vapi.ts b/vapi.ts
index 650c20a..4004ee4 100644
--- a/vapi.ts
+++ b/vapi.ts
@@ -1,4 +1,4 @@
-import { Call, CreateAssistantDTO, CreateSquadDTO, OverrideAssistantDTO } from './api';
+import { Call, CreateAssistantDTO, CreateSquadDTO, AssistantOverrides } from './api';
 import DailyIframe, {
   DailyCall,
   DailyEventObjectAppMessage,
@@ -124,7 +124,7 @@ export default class Vapi extends VapiEventEmitter {
 
   async start(
     assistant?: CreateAssistantDTO | string,
-    assistantOverrides?: OverrideAssistantDTO,
+    assistantOverrides?: AssistantOverrides,
     squad?: CreateSquadDTO | string,
   ): Promise<Call | null> {
     if (!assistant && !squad) {