diff --git a/packages/core/src/providers/webex.ts b/packages/core/src/providers/webex.ts
index 68d8b917a3..1a9bce2590 100755
--- a/packages/core/src/providers/webex.ts
+++ b/packages/core/src/providers/webex.ts
@@ -73,7 +73,7 @@ export interface WebexProfile extends Record<string, any> {
  * :::
  */
 export default function Webex<P extends WebexProfile>(
-  config: OAuthUserConfig<P> & { apiBaseUrl: string }
+  config: OAuthUserConfig<P> & { apiBaseUrl?: string }
 ): OAuthConfig<P> {
   const apiBaseUrl = config?.apiBaseUrl ?? "https://webexapis.com/v1"