diff --git a/package.json b/package.json
index f5b64de..e8d4d3d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@authsignal/browser",
-  "version": "0.3.4",
+  "version": "0.3.5",
   "type": "module",
   "main": "dist/index.js",
   "module": "dist/index.js",
diff --git a/src/passkey.ts b/src/passkey.ts
index e43cb1f..88c57d6 100644
--- a/src/passkey.ts
+++ b/src/passkey.ts
@@ -33,6 +33,7 @@ export class Passkey {
     return addAuthenticatorResponse?.accessToken;
   }
 
+  async signIn(): Promise<string | undefined>;
   async signIn(params?: {token: string}): Promise<string | undefined>;
   async signIn(params?: {autofill: boolean}): Promise<string | undefined>;
   async signIn(params?: {token?: string; autofill?: boolean} | undefined) {