diff --git a/README.md b/README.md
index a1936f5..344a4dc 100644
--- a/README.md
+++ b/README.md
@@ -771,6 +771,7 @@ func main() {
 		Message:  "test message",
 		Badge:    1,
 		Category: "test",
+		Sound:    "test",
 		Alert: &proto.Alert{
 			Title:    "Test Title",
 			Body:     "Test Alert Body",
@@ -805,6 +806,7 @@ function main() {
   request.setTitle("hello2");
   request.setBadge(2);
   request.setCategory("mycategory");
+  request.setSound("sound")
   alert.setTitle("title");
   request.setAlert(alert);
   client.send(request, function (err, response) {
@@ -854,6 +856,7 @@ func main() {
 		Message:  "test message",
 		Badge:    1,
 		Category: "test",
+		Sound:    "test",
 		Alert: &proto.Alert{
 			Title:    "Test Title",
 			Body:     "Test Alert Body",
diff --git a/rpc/example/go/send/main.go b/rpc/example/go/send/main.go
index d72d9a6..8e338e7 100644
--- a/rpc/example/go/send/main.go
+++ b/rpc/example/go/send/main.go
@@ -28,6 +28,7 @@ func main() {
 		Message:  "test message",
 		Badge:    1,
 		Category: "test",
+		Sound:    "test",
 		Alert: &proto.Alert{
 			Title:    "Test Title",
 			Body:     "Test Alert Body",
diff --git a/rpc/example/node/client.js b/rpc/example/node/client.js
index 6243c2f..3e1889d 100644
--- a/rpc/example/node/client.js
+++ b/rpc/example/node/client.js
@@ -14,6 +14,7 @@ function main() {
   request.setTitle("hello2");
   request.setBadge(2);
   request.setCategory("mycategory");
+  request.setSound("sound")
   alert.setTitle("title");
   request.setAlert(alert);
   client.send(request, function (err, response) {
diff --git a/rpc/example/node/gorush_pb.js b/rpc/example/node/gorush_pb.js
index 1d543d0..4003ee5 100644
--- a/rpc/example/node/gorush_pb.js
+++ b/rpc/example/node/gorush_pb.js
@@ -270,7 +270,8 @@ proto.proto.NotificationRequest.toObject = function(includeInstance, msg) {
     key: jspb.Message.getFieldWithDefault(msg, 6, ""),
     badge: jspb.Message.getFieldWithDefault(msg, 7, 0),
     category: jspb.Message.getFieldWithDefault(msg, 8, ""),
-    alert: (f = msg.getAlert()) && proto.proto.Alert.toObject(includeInstance, f)
+    alert: (f = msg.getAlert()) && proto.proto.Alert.toObject(includeInstance, f),
+    sound: jspb.Message.getFieldWithDefault(msg, 10, "")
   };
 
   if (includeInstance) {
@@ -344,6 +345,10 @@ proto.proto.NotificationRequest.deserializeBinaryFromReader = function(msg, read
       reader.readMessage(value,proto.proto.Alert.deserializeBinaryFromReader);
       msg.setAlert(value);
       break;
+    case 10:
+      var value = /** @type {string} */ (reader.readString());
+      msg.setSound(value);
+      break;
     default:
       reader.skipField();
       break;
@@ -436,6 +441,13 @@ proto.proto.NotificationRequest.serializeBinaryToWriter = function(message, writ
       proto.proto.Alert.serializeBinaryToWriter
     );
   }
+  f = message.getSound();
+  if (f.length > 0) {
+    writer.writeString(
+      10,
+      f
+    );
+  }
 };
 
 
@@ -605,6 +617,21 @@ proto.proto.NotificationRequest.prototype.hasAlert = function() {
 };
 
 
+/**
+ * optional string sound = 10;
+ * @return {string}
+ */
+proto.proto.NotificationRequest.prototype.getSound = function() {
+  return /** @type {string} */ (jspb.Message.getFieldWithDefault(this, 10, ""));
+};
+
+
+/** @param {string} value */
+proto.proto.NotificationRequest.prototype.setSound = function(value) {
+  jspb.Message.setField(this, 10, value);
+};
+
+
 
 /**
  * Generated by JsPbCodeGenerator.
diff --git a/rpc/proto/gorush.pb.go b/rpc/proto/gorush.pb.go
index 20f4ffd..38900b1 100644
--- a/rpc/proto/gorush.pb.go
+++ b/rpc/proto/gorush.pb.go
@@ -104,6 +104,7 @@ type NotificationRequest struct {
 	Badge    int32    `protobuf:"varint,7,opt,name=badge" json:"badge,omitempty"`
 	Category string   `protobuf:"bytes,8,opt,name=category" json:"category,omitempty"`
 	Alert    *Alert   `protobuf:"bytes,9,opt,name=alert" json:"alert,omitempty"`
+	Sound    string   `protobuf:"bytes,10,opt,name=sound" json:"sound,omitempty"`
 }
 
 func (m *NotificationRequest) Reset()                    { *m = NotificationRequest{} }
@@ -174,6 +175,13 @@ func (m *NotificationRequest) GetAlert() *Alert {
 	return nil
 }
 
+func (m *NotificationRequest) GetSound() string {
+	if m != nil {
+		return m.Sound
+	}
+	return ""
+}
+
 type NotificationReply struct {
 	Success bool  `protobuf:"varint,1,opt,name=success" json:"success,omitempty"`
 	Counts  int32 `protobuf:"varint,2,opt,name=counts" json:"counts,omitempty"`
@@ -378,32 +386,33 @@ var _Health_serviceDesc = grpc.ServiceDesc{
 func init() { proto1.RegisterFile("gorush.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
-	// 424 bytes of a gzipped FileDescriptorProto
+	// 433 bytes of a gzipped FileDescriptorProto
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-	0xd4, 0x3a, 0x7f, 0x33, 0x07, 0x03, 0x00, 0x00,
+	0x10, 0xc6, 0x37, 0x6d, 0x93, 0xb6, 0xd3, 0x05, 0xca, 0x2c, 0x42, 0xa6, 0xa7, 0xca, 0xa7, 0x9e,
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+	0x7b, 0xf4, 0x0d, 0x3c, 0x39, 0x4b, 0xe0, 0x0c, 0xc6, 0x5f, 0xd2, 0x8f, 0xe9, 0xfd, 0xb7, 0x74,
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+	0xf9, 0x7b, 0x08, 0x0c, 0x36, 0x77, 0x90, 0xdc, 0xba, 0x27, 0x88, 0xd7, 0x30, 0xda, 0xca, 0x72,
+	0x8f, 0x8b, 0x4e, 0xbf, 0xe7, 0xc9, 0x2c, 0x48, 0x6f, 0xae, 0x2a, 0x5a, 0x7a, 0x61, 0x3b, 0xf9,
+	0x91, 0xf1, 0x1a, 0x62, 0x37, 0x36, 0xbe, 0xea, 0x5b, 0xc5, 0x77, 0x5a, 0xfc, 0x7f, 0xcb, 0x5d,
+	0xe2, 0x52, 0xaf, 0xff, 0x04, 0x00, 0x00, 0xff, 0xff, 0xa8, 0xf6, 0xa7, 0x4d, 0x1d, 0x03, 0x00,
+	0x00,
 }
diff --git a/rpc/proto/gorush.proto b/rpc/proto/gorush.proto
index bbdaacc..46671c9 100644
--- a/rpc/proto/gorush.proto
+++ b/rpc/proto/gorush.proto
@@ -18,6 +18,7 @@ message NotificationRequest {
   int32 badge = 7;
   string category = 8;
   Alert alert = 9;
+  string sound = 10;
 }
 
 message NotificationReply {
diff --git a/rpc/server.go b/rpc/server.go
index 0f0d423..a2eb6c2 100644
--- a/rpc/server.go
+++ b/rpc/server.go
@@ -57,6 +57,7 @@ func (s *Server) Send(ctx context.Context, in *proto.NotificationRequest) (*prot
 		Topic:    in.Topic,
 		APIKey:   in.Key,
 		Category: in.Category,
+		Sound:    in.Sound,
 	}
 
 	if badge > 0 {