diff --git a/pype/settings/entities/base_entity.py b/pype/settings/entities/base_entity.py
index ce16f975bc..85109472f7 100644
--- a/pype/settings/entities/base_entity.py
+++ b/pype/settings/entities/base_entity.py
@@ -126,6 +126,8 @@ class BaseEntity:
 
         self.override_state = OverrideState.NOT_DEFINED
 
+        self.on_change_callbacks = []
+
     @property
     def path(self):
         if self._path is not None:
@@ -494,12 +496,11 @@ class RootEntity(BaseEntity):
         ))
 
     def on_change(self):
-        raise TypeError("{} does not support `on_change`".format(
-            self.__class__.__name__
-        ))
+        for callback in self.on_change_callbacks:
+            callback()
 
     def on_child_change(self, child_obj):
-        pass
+        self.on_change()
 
     def get_child_path(self, child_obj):
         for key, _child_obj in self.non_gui_children.items():
diff --git a/pype/tools/settings/settings/widgets/categories.py b/pype/tools/settings/settings/widgets/categories.py
index 03d6254d96..304237443d 100644
--- a/pype/tools/settings/settings/widgets/categories.py
+++ b/pype/tools/settings/settings/widgets/categories.py
@@ -519,6 +519,8 @@ class SystemWidget(SettingsCategoryWidget):
         self.set_state(CategoryState.Working)
 
         self.entity = base_entity.SystemRootEntity()
+        self.entity.on_change_callbacks.append(self._on_entity_change)
+        self.entity.set_studio_state()
 
         while self.content_layout.count() != 0:
             widget = self.content_layout.itemAt(0).widget()
@@ -534,6 +536,13 @@ class SystemWidget(SettingsCategoryWidget):
 
         self.set_state(CategoryState.Idle)
 
+    def _on_entity_change(self):
+        self.hierarchical_style_update()
+
+    def hierarchical_style_update(self):
+        for input_field in self.input_fields:
+            input_field.hierarchical_style_update()
+
     def add_widget_to_layout(self, widget, label_widget=None):
         if label_widget:
             raise NotImplementedError(