1 files changed, 1 insertions, 1 deletions
diff --git a/packages/server/src/authentication/generateAuthenticationOptions.ts b/packages/server/src/authentication/generateAuthenticationOptions.ts
index b80473e..3561b28 100644
--- a/packages/server/src/authentication/generateAuthenticationOptions.ts
+++ b/packages/server/src/authentication/generateAuthenticationOptions.ts
@@ -10,7 +10,7 @@ import { generateChallenge } from '../helpers/generateChallenge';
 
 export type GenerateAuthenticationOptionsOpts = {
   allowCredentials?: PublicKeyCredentialDescriptorFuture[];
-  challenge?: string | Buffer;
+  challenge?: string | Uint8Array;
   timeout?: number;
   userVerification?: UserVerificationRequirement;
   extensions?: AuthenticationExtensionsClientInputs;