diff --git a/pkg/crypto/keyexchange/ecdh.go b/pkg/crypto/keyexchange/ecdh.go
index 34375c8..742101c 100644
--- a/pkg/crypto/keyexchange/ecdh.go
+++ b/pkg/crypto/keyexchange/ecdh.go
@@ -9,7 +9,7 @@ import (
 
 var (
 	// DefaultDHCurve is the default elliptic curve used for signing.
-	DefaultDHCurve = ecdh.P384
+	DefaultDHCurve = ecdh.X25519
 )
 
 // GenerateDHKey generates a new ECDH private key for key exchange.