diff --git a/src/types.ts b/src/types.ts
index 73213d05..5509e68f 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -349,7 +349,7 @@ export interface PasswordlessWithEmailOptions {
   /**
    * Optional parameters, used when strategy is 'linḱ'
    */
-  authParams?: string;
+  authParams?: object;
   [key: string]: any;
 }
 
@@ -368,7 +368,7 @@ export interface PasswordlessWithSMSOptions {
   /**
    * Optional passwordless parameters
    */
-  authParams?: string;
+  authParams?: object;
   [key: string]: any;
 }