diff --git a/lazarus/lib/x86_64-linux/unit1.o b/lazarus/lib/x86_64-linux/unit1.o
index 4af2181..dcf1301 100644
Binary files a/lazarus/lib/x86_64-linux/unit1.o and b/lazarus/lib/x86_64-linux/unit1.o differ
diff --git a/lazarus/lib/x86_64-linux/unit1.ppu b/lazarus/lib/x86_64-linux/unit1.ppu
index 61f5abb..90eccd5 100644
Binary files a/lazarus/lib/x86_64-linux/unit1.ppu and b/lazarus/lib/x86_64-linux/unit1.ppu differ
diff --git a/lazarus/lib/x86_64-linux/unitipcthread.o b/lazarus/lib/x86_64-linux/unitipcthread.o
index 368bc27..9bb6c4d 100644
Binary files a/lazarus/lib/x86_64-linux/unitipcthread.o and b/lazarus/lib/x86_64-linux/unitipcthread.o differ
diff --git a/lazarus/lib/x86_64-linux/unitipcthread.ppu b/lazarus/lib/x86_64-linux/unitipcthread.ppu
index b3b4d59..f9463e1 100644
Binary files a/lazarus/lib/x86_64-linux/unitipcthread.ppu and b/lazarus/lib/x86_64-linux/unitipcthread.ppu differ
diff --git a/lazarus/phpgui-x86_64-linux b/lazarus/phpgui-x86_64-linux
index ea0f110..bca02f6 100755
Binary files a/lazarus/phpgui-x86_64-linux and b/lazarus/phpgui-x86_64-linux differ
diff --git a/lazarus/unitipcthread.pas b/lazarus/unitipcthread.pas
index 151d352..33a5483 100644
--- a/lazarus/unitipcthread.pas
+++ b/lazarus/unitipcthread.pas
@@ -429,6 +429,7 @@ procedure TIpcThread.SetObjectProperty;
   propertyValue: Variant;
   propInfo: PPropInfo;
   subpropertyName: String;
+  messageId: Integer;
 begin
   // param[0] = objectId
   // param[1] = propertyName
@@ -467,6 +468,9 @@ procedure TIpcThread.SetObjectProperty;
       begin
         // @TODO: Convert propertyValue to a object checking with PropIsType and GetObjectPropClass
         SetPropValue(obj, propertyName, propertyValue);
+
+        messageId := jData.FindPath('id').AsInteger;
+        Output('{"id": ' + IntToStr(messageId) + ',"result": { "propertyName": "' + propertyName + '", "propertyValue": "' + VarToStr(propertyValue) + '"}}');
       end;
     end;
   end;
diff --git a/src/Components/LazarusObjectInterface.php b/src/Components/LazarusObjectInterface.php
index fbf3b11..ca3a798 100644
--- a/src/Components/LazarusObjectInterface.php
+++ b/src/Components/LazarusObjectInterface.php
@@ -28,10 +28,11 @@ public function getLazarusClass();
      * Fire an object event
      *
      * @param string $eventName Event Name
+     * @param array $arguments Aguments
      *
      * @return void
      */
-    public function fire($eventName);
+    public function fire($eventName, array $arguments = []);
 
     /**
      * Add a listener to an event
diff --git a/src/Components/Object.php b/src/Components/Object.php
index 2281235..8a162c6 100644
--- a/src/Components/Object.php
+++ b/src/Components/Object.php
@@ -194,8 +194,14 @@ protected function set($name, $value)
                 $name,
                 $value
             ],
-            function ($result) {
-                // Ok, the property changed
+            function ($result) use ($name, $value) {
+                $this->fire(
+                    'onpropertySet',
+                    [
+                        $name,
+                        $value
+                    ]
+                );
             }
         );
     }
@@ -234,11 +240,11 @@ public function getLazarusClass()
     /**
     * {@inheritdoc}
     */
-    public function fire($eventName)
+    public function fire($eventName, array $arguments = [])
     {
         if (array_key_exists($eventName, $this->eventHandlers)) {
             foreach ($this->eventHandlers[$eventName] as $eventHandler) {
-                $eventHandler();
+                call_user_func_array($eventHandler, $arguments);
             }
         }
     }