diff --git a/src/ctap2.rs b/src/ctap2.rs
index 33124be..dae7a04 100644
--- a/src/ctap2.rs
+++ b/src/ctap2.rs
@@ -241,8 +241,6 @@ pub struct AuthenticatorOptions {
 //pub struct CredentialPublicKey {
 //}
 
-pub type PinAuth = serde_byte_array::ByteArray<16>;
-
 // #[derive(Clone,Debug,Eq,PartialEq)]
 // // #[serde(rename_all = "camelCase")]
 // pub struct AuthenticatorData {
diff --git a/src/ctap2/get_assertion.rs b/src/ctap2/get_assertion.rs
index ec537b3..fd75b7b 100644
--- a/src/ctap2/get_assertion.rs
+++ b/src/ctap2/get_assertion.rs
@@ -2,7 +2,7 @@ use crate::{Bytes, String, Vec};
 use serde::{Deserialize, Serialize};
 use serde_indexed::{DeserializeIndexed, SerializeIndexed};
 
-use super::{AuthenticatorOptions, PinAuth};
+use super::AuthenticatorOptions;
 use crate::cose::EcdhEsHkdf256PublicKey;
 use crate::sizes::*;
 use crate::webauthn::*;
@@ -65,7 +65,7 @@ pub struct Request<'a> {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub options: Option<AuthenticatorOptions>,
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub pin_auth: Option<&'a PinAuth>,
+    pub pin_auth: Option<&'a serde_bytes::Bytes>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub pin_protocol: Option<u32>,
 }
diff --git a/src/ctap2/make_credential.rs b/src/ctap2/make_credential.rs
index e0faba1..c1f2b92 100644
--- a/src/ctap2/make_credential.rs
+++ b/src/ctap2/make_credential.rs
@@ -3,7 +3,7 @@ use crate::{Bytes, String, Vec};
 use serde::{Deserialize, Serialize};
 use serde_indexed::{DeserializeIndexed, SerializeIndexed};
 
-use super::{AuthenticatorOptions, PinAuth};
+use super::AuthenticatorOptions;
 use crate::ctap2::credential_management::CredentialProtectionPolicy;
 use crate::sizes::*;
 use crate::webauthn::*;
@@ -82,7 +82,7 @@ pub struct Request<'a> {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub options: Option<AuthenticatorOptions>,
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub pin_auth: Option<&'a PinAuth>,
+    pub pin_auth: Option<&'a serde_bytes::Bytes>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub pin_protocol: Option<u32>,
 }