diff --git a/identity.go b/identity.go
index b57a65de..9b41e952 100644
--- a/identity.go
+++ b/identity.go
@@ -6,10 +6,7 @@ import (
 
 type (
 	// PublicKey is a generic public key interface used by dbft.
-	PublicKey interface {
-		// Equals returns whether public key is equal to the other.
-		Equals(other PublicKey) bool
-	}
+	PublicKey any
 
 	// PrivateKey is a generic private key interface used by dbft.
 	PrivateKey interface {