diff --git a/index.d.ts b/index.d.ts
index 3927d33b..2014dc82 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -55,7 +55,8 @@ declare namespace Octokit {
       | string
       | { username: string; password: string; on2fa: () => Promise<string> }
       | { clientId: string; clientSecret: string }
-      | { (): string | Promise<string> };
+      | { (): string | Promise<string> }
+      | any;
     userAgent?: string;
     previews?: string[];
     baseUrl?: string;
diff --git a/scripts/update-endpoints/templates/index.d.ts.tpl b/scripts/update-endpoints/templates/index.d.ts.tpl
index b2a8919a..d2e28ba2 100644
--- a/scripts/update-endpoints/templates/index.d.ts.tpl
+++ b/scripts/update-endpoints/templates/index.d.ts.tpl
@@ -46,7 +46,7 @@ declare namespace Octokit {
 
   export interface Options {
     authStrategy?: any;
-    auth?: string | { username: string; password: string; on2fa: () => Promise<string> } | { clientId: string; clientSecret: string; } | { (): (string | Promise<string>) };
+    auth?: string | { username: string; password: string; on2fa: () => Promise<string> } | { clientId: string; clientSecret: string; } | { (): (string | Promise<string>) } | any;
     userAgent?: string;
     previews?: string[];
     baseUrl?: string;