diff --git a/Cargo.toml b/Cargo.toml
index 06432c4..fa73e90 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,13 +11,13 @@ repository = "https://github.com/trussed-dev/ctap-types"
 arbitrary = { version = "1.3.2", features = ["derive"], optional = true }
 bitflags = "1.3"
 cbor-smol = "0.4"
-cosey = "0.3.1"
+cosey = { path = "../cosey_fork" }
 delog = "0.1"
 heapless = { version = "0.7", default-features = false, features = ["serde"] }
 heapless-bytes = "0.3"
 iso7816 = "0.1.2"
 serde = { version = "1", default-features = false, features = ["derive"] }
-serde-indexed = "0.1.1"
+serde-indexed = "0.1.0"
 serde_bytes = { version = "0.11.14", default-features = false }
 serde_repr = "0.1"
 
diff --git a/src/ctap2/client_pin.rs b/src/ctap2/client_pin.rs
index 048f375..70f5754 100644
--- a/src/ctap2/client_pin.rs
+++ b/src/ctap2/client_pin.rs
@@ -73,7 +73,7 @@ pub struct Request<'a> {
 
     // 0x07
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub(crate) _placeholder07: Option<()>,
+    pub key_agreement_pqc: Option<Bytes<1088>>,
 
     // 0x08
     #[serde(skip_serializing_if = "Option::is_none")]
@@ -136,7 +136,7 @@ mod tests {
             pin_auth: None,
             new_pin_enc: None,
             pin_hash_enc: None,
-            _placeholder07: None,
+            key_agreement_pqc: None,
             _placeholder08: None,
             permissions: None,
             rp_id: None,
@@ -165,7 +165,7 @@ mod tests {
             pin_auth: None,
             new_pin_enc: None,
             pin_hash_enc: None,
-            _placeholder07: None,
+            key_agreement_pqc: None,
             _placeholder08: None,
             permissions: None,
             rp_id: None,
@@ -198,7 +198,7 @@ mod tests {
             pin_auth: Some(serde_bytes::Bytes::new(PIN_AUTH)),
             new_pin_enc: Some(serde_bytes::Bytes::new(NEW_PIN_ENC)),
             pin_hash_enc: None,
-            _placeholder07: None,
+            key_agreement_pqc: None,
             _placeholder08: None,
             permissions: None,
             rp_id: None,
@@ -256,7 +256,7 @@ mod tests {
             pin_auth: Some(serde_bytes::Bytes::new(PIN_AUTH)),
             new_pin_enc: Some(serde_bytes::Bytes::new(NEW_PIN_ENC)),
             pin_hash_enc: Some(serde_bytes::Bytes::new(PIN_HASH_ENC)),
-            _placeholder07: None,
+            key_agreement_pqc: None,
             _placeholder08: None,
             permissions: None,
             rp_id: None,
@@ -317,7 +317,7 @@ mod tests {
             pin_auth: None,
             new_pin_enc: None,
             pin_hash_enc: Some(serde_bytes::Bytes::new(PIN_HASH_ENC)),
-            _placeholder07: None,
+            key_agreement_pqc: None,
             _placeholder08: None,
             permissions: None,
             rp_id: None,
@@ -372,7 +372,7 @@ mod tests {
             pin_auth: None,
             new_pin_enc: None,
             pin_hash_enc: Some(serde_bytes::Bytes::new(PIN_HASH_ENC)),
-            _placeholder07: None,
+            key_agreement_pqc: None,
             _placeholder08: None,
             permissions: Some(0x04),
             rp_id: Some("example.com"),
diff --git a/src/sizes.rs b/src/sizes.rs
index 3f36595..4a146a6 100644
--- a/src/sizes.rs
+++ b/src/sizes.rs
@@ -1,10 +1,10 @@
-pub const AUTHENTICATOR_DATA_LENGTH: usize = 676;
+pub const AUTHENTICATOR_DATA_LENGTH: usize = 2392;
 // pub const AUTHENTICATOR_DATA_LENGTH_BYTES: usize = 512;
 
-pub const ASN1_SIGNATURE_LENGTH: usize = 77;
+pub const ASN1_SIGNATURE_LENGTH: usize = 3293;
 // pub const ASN1_SIGNATURE_LENGTH_BYTES: usize = 72;
 
-pub const COSE_KEY_LENGTH: usize = 256;
+pub const COSE_KEY_LENGTH: usize = 2048;
 // pub const COSE_KEY_LENGTH_BYTES: usize = 256;
 
 pub const MAX_CREDENTIAL_ID_LENGTH: usize = 255;
diff --git a/src/webauthn.rs b/src/webauthn.rs
index 48d4dc6..f165b74 100644
--- a/src/webauthn.rs
+++ b/src/webauthn.rs
@@ -158,9 +158,12 @@ pub enum UnknownPKCredentialParam {
 pub const ES256: i32 = -7;
 /// EdDSA
 pub const ED_DSA: i32 = -8;
+/// PQC
+pub const CRYDI3: i32 = -20;
+pub const KYBER768: i32 = -24;
 
-pub const COUNT_KNOWN_ALGS: usize = 2;
-pub const KNOWN_ALGS: [i32; COUNT_KNOWN_ALGS] = [ES256, ED_DSA];
+pub const COUNT_KNOWN_ALGS: usize = 4;
+pub const KNOWN_ALGS: [i32; COUNT_KNOWN_ALGS] = [ES256, ED_DSA, CRYDI3, KYBER768];
 
 impl TryFrom<PublicKeyCredentialParameters> for KnownPublicKeyCredentialParameters {
     type Error = UnknownPKCredentialParam;