diff --git a/tuic/Cargo.toml b/tuic/Cargo.toml
index 3ccc9c8..2b999b5 100644
--- a/tuic/Cargo.toml
+++ b/tuic/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tuic"
-version = "5.0.0-pre-alpha5"
+version = "5.0.0-pre-alpha6"
 authors = ["EAimTY <ea.imty@gmail.com>"]
 description = "Delicately-TUICed 0-RTT proxy protocol"
 categories = ["network-programming"]
diff --git a/tuic/src/model/authenticate.rs b/tuic/src/model/authenticate.rs
index 2c0f6a9..14d0ce6 100644
--- a/tuic/src/model/authenticate.rs
+++ b/tuic/src/model/authenticate.rs
@@ -17,7 +17,7 @@ impl Authenticate<side::Tx> {
     pub(super) fn new(
         uuid: Uuid,
         password: impl AsRef<[u8]>,
-        exporter: impl KeyingMaterialExporter,
+        exporter: &impl KeyingMaterialExporter,
     ) -> Self {
         Self {
             inner: Side::Tx(Tx {
@@ -75,7 +75,7 @@ impl Authenticate<side::Rx> {
     pub fn is_valid(
         &self,
         password: impl AsRef<[u8]>,
-        exporter: impl KeyingMaterialExporter,
+        exporter: &impl KeyingMaterialExporter,
     ) -> bool {
         let Side::Rx(rx) = &self.inner else { unreachable!() };
         rx.token == exporter.export_keying_material(rx.uuid.as_ref(), password.as_ref())
diff --git a/tuic/src/model/mod.rs b/tuic/src/model/mod.rs
index e928d0c..e0db0c2 100644
--- a/tuic/src/model/mod.rs
+++ b/tuic/src/model/mod.rs
@@ -62,7 +62,7 @@ where
         &self,
         uuid: Uuid,
         password: impl AsRef<[u8]>,
-        exporter: impl KeyingMaterialExporter,
+        exporter: &impl KeyingMaterialExporter,
     ) -> Authenticate<side::Tx> {
         Authenticate::<side::Tx>::new(uuid, password, exporter)
     }