diff --git a/tcp/dialer_test.go b/tcp/dialer_test.go
index 2a4a3782..bc709175 100644
--- a/tcp/dialer_test.go
+++ b/tcp/dialer_test.go
@@ -154,7 +154,7 @@ func mustNewEchoServerTLS() (*echoServer, string, string) {
 	cert := x509.CertFile("")
 	key := x509.KeyFile("")
 
-	tlsConfig, err := rtls.CreateServerConfig(cert, key, "", "", true)
+	tlsConfig, err := rtls.CreateServerConfig(cert, key, rtls.NoCACert, true)
 	if err != nil {
 		panic("failed to create TLS config")
 	}
diff --git a/tcp/mux.go b/tcp/mux.go
index 3dc0ab2c..52842083 100644
--- a/tcp/mux.go
+++ b/tcp/mux.go
@@ -103,7 +103,7 @@ func NewTLSMux(ln net.Listener, adv net.Addr, cert, key, caCert, serverName stri
 		return nil, err
 	}
 
-	mux.tlsConfig, err = rtls.CreateConfig(cert, key, caCert, serverName, insecure, mutual)
+	mux.tlsConfig, err = rtls.CreateConfig(cert, key, caCert, insecure, mutual)
 	if err != nil {
 		return nil, fmt.Errorf("cannot create TLS config: %s", err)
 	}