diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19e35d8..3b7f91b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,3 +2,5 @@
 create initial release.
 ## 1.1.0
 Changed the import file to be only camel.dart
+## 1.2.0
+made it possible to omit the command argument of the Message class.
diff --git a/lib/message.dart b/lib/message.dart
index 9cae0fd..5a273f1 100644
--- a/lib/message.dart
+++ b/lib/message.dart
@@ -167,10 +167,10 @@ class Message {
 
   /// constructor from params(send data).
   Message.fromBody({
-    required String command,
+    String? command,
     required this.body,
   }) {
-    header = MessageHeader.fromParam(command: command, bodySize: body.length);
+    header = MessageHeader.fromParam(command: command ?? "", bodySize: body.length);
   }
 }
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 92c979e..19bdc7b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: camel
 description: A Flutter package for communicating in a local network.
-version: 1.1.0
+version: 1.2.0
 homepage:
 
 environment:
diff --git a/test/message_test.dart b/test/message_test.dart
index 2995740..902ed00 100644
--- a/test/message_test.dart
+++ b/test/message_test.dart
@@ -239,7 +239,7 @@ void messageFormatTest() {
 }
 
 Message constructMessageFromBody(
-    {required String command, required String body}) {
+    {String? command, required String body}) {
   return Message.fromBody(
       command: command, body: body); //Uint8List.fromList(utf8.encode(body)));
 }
@@ -253,7 +253,7 @@ void checkMessageCommandAndBody(
 void messageConstructFromSendTest() {
   group("constructor from sender", () {
     test("should be construct message command and body", () {
-      Message message = constructMessageFromBody(command: "", body: "");
+      Message message = constructMessageFromBody(body: "");
       checkMessageCommandAndBody(message: message, command: "", body: "");
     });