diff --git a/src/activities/Elsa.Activities.Mqtt/Activities/SendMqttMessage/SendMqttMessage.cs b/src/activities/Elsa.Activities.Mqtt/Activities/SendMqttMessage/SendMqttMessage.cs
index b09f491827..abe53feb16 100644
--- a/src/activities/Elsa.Activities.Mqtt/Activities/SendMqttMessage/SendMqttMessage.cs
+++ b/src/activities/Elsa.Activities.Mqtt/Activities/SendMqttMessage/SendMqttMessage.cs
@@ -28,9 +28,10 @@ public SendMqttMessage(IMessageSenderClientFactory messageSenderClientFactory)
             Hint = "Message body",
             Order = 2,
             UIHint = ActivityInputUIHints.MultiLine,
-            SupportedSyntaxes = new[] { SyntaxNames.Json })]
+            DefaultSyntax = SyntaxNames.Json,
+            SupportedSyntaxes = new[] { SyntaxNames.Json, SyntaxNames.JavaScript, SyntaxNames.Liquid }
         public string Message { get; set; } = default!;
-
+        
         [ActivityOutput(Hint = "Received message")]
         public object? Output { get; set; }
         
@@ -45,4 +46,4 @@ protected override async ValueTask<IActivityExecutionResult> OnExecuteAsync(Acti
             return Done();
         }
     }
-}
\ No newline at end of file
+}