diff --git a/src/app/ui/file_list.h b/src/app/ui/file_list.h
index 54a8d860d..5a7288c46 100644
--- a/src/app/ui/file_list.h
+++ b/src/app/ui/file_list.h
@@ -10,10 +10,10 @@
 #pragma once
 
 #include "app/file_system.h"
-#include "app/ui/animated_widget.h"
 #include "base/paths.h"
 #include "base/time.h"
 #include "obs/signal.h"
+#include "ui/animated_widget.h"
 #include "ui/timer.h"
 #include "ui/widget.h"
 
@@ -28,7 +28,7 @@ namespace os {
 namespace app {
 
   class FileList : public ui::Widget
-                 , private AnimatedWidget {
+                 , private ui::AnimatedWidget {
   public:
     FileList();
     virtual ~FileList();
diff --git a/src/app/ui/tabs.h b/src/app/ui/tabs.h
index 4df6bfb81..166191e7c 100644
--- a/src/app/ui/tabs.h
+++ b/src/app/ui/tabs.h
@@ -9,7 +9,7 @@
 #define APP_UI_TABS_H_INCLUDED
 #pragma once
 
-#include "app/ui/animated_widget.h"
+#include "ui/animated_widget.h"
 #include "ui/mouse_buttons.h"
 #include "ui/timer.h"
 #include "ui/widget.h"
@@ -111,7 +111,7 @@ namespace app {
 
   // Tabs control. Used to show opened documents.
   class Tabs : public ui::Widget
-             , public AnimatedWidget {
+             , public ui::AnimatedWidget {
     struct Tab {
       TabView* view;
       std::string text;
diff --git a/src/app/ui/workspace_panel.h b/src/app/ui/workspace_panel.h
index 63d33864a..720a5cb10 100644
--- a/src/app/ui/workspace_panel.h
+++ b/src/app/ui/workspace_panel.h
@@ -8,8 +8,8 @@
 #define APP_UI_WORKSPACE_PANEL_H_INCLUDED
 #pragma once
 
-#include "app/ui/animated_widget.h"
 #include "app/ui/workspace_views.h"
+#include "ui/animated_widget.h"
 #include "ui/widget.h"
 
 #include <map>
@@ -26,7 +26,7 @@ namespace app {
   };
 
   class WorkspacePanel : public ui::Widget
-                       , public AnimatedWidget {
+                       , public ui::AnimatedWidget {
     enum Ani : int {
       ANI_NONE,
       ANI_DROPAREA,
diff --git a/src/app/ui/animated_widget.h b/src/ui/animated_widget.h
similarity index 84%
rename from src/app/ui/animated_widget.h
rename to src/ui/animated_widget.h
index 21da6bffe..d165c8411 100644
--- a/src/app/ui/animated_widget.h
+++ b/src/ui/animated_widget.h
@@ -1,11 +1,12 @@
-// Aseprite
+// Aseprite UI Library
+// Copyright (C) 2019  Igara Studio S.A.
 // Copyright (C) 2001-2016  David Capello
 //
-// This program is distributed under the terms of
-// the End-User License Agreement for Aseprite.
+// This file is released under the terms of the MIT license.
+// Read LICENSE.txt for more information.
 
-#ifndef APP_UI_ANIMATED_WIDGET_H_INCLUDED
-#define APP_UI_ANIMATED_WIDGET_H_INCLUDED
+#ifndef UI_ANIMATED_WIDGET_H_INCLUDED
+#define UI_ANIMATED_WIDGET_H_INCLUDED
 #pragma once
 
 #include "obs/connection.h"
@@ -13,14 +14,13 @@
 
 #include <cmath>
 
-namespace app {
+namespace ui {
 
   class AnimatedWidget {
   public:
     AnimatedWidget()
       : m_timer(1000/60)
-      , m_animation(0)
-    {
+      , m_animation(0) {
       m_scopedConn = m_timer.Tick.connect(&AnimatedWidget::onTick, this);
     }
 
@@ -90,6 +90,6 @@ namespace app {
     obs::scoped_connection m_scopedConn;
   };
 
-} // namespace app
+} // namespace ui
 
 #endif