diff --git a/src/opaque.rs b/src/opaque.rs
index 436199c..043c1d8 100644
--- a/src/opaque.rs
+++ b/src/opaque.rs
@@ -166,7 +166,7 @@ impl<CS: CipherSuite> LoginFirstMessage<CS> {
 /// login attempt.
 pub struct LoginSecondMessage<Grp, KeyFormat, KE, D>
 where
-    KeyFormat: KeyPair<Repr = Key>,
+    KeyFormat: KeyPair,
     KE: KeyExchange<D>,
     D: Hash,
 {
@@ -182,7 +182,7 @@ where
 impl<Grp, KeyFormat, KE, D> LoginSecondMessage<Grp, KeyFormat, KE, D>
 where
     Grp: Group,
-    KeyFormat: KeyPair<Repr = Key>,
+    KeyFormat: KeyPair,
     KE: KeyExchange<D>,
     D: Hash,
 {
@@ -200,7 +200,7 @@ where
 impl<Grp, KeyFormat, KE, D> TryFrom<&[u8]> for LoginSecondMessage<Grp, KeyFormat, KE, D>
 where
     Grp: Group,
-    KeyFormat: KeyPair<Repr = Key>,
+    KeyFormat: KeyPair,
     KE: KeyExchange<D>,
     D: Hash,
 {