diff --git a/examples/component/checkbox.cpp b/examples/component/checkbox.cpp
index 7b3fba403..c63de2834 100644
--- a/examples/component/checkbox.cpp
+++ b/examples/component/checkbox.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/checkbox.hpp"
 
 #include "ftxui/component/component.hpp"
diff --git a/examples/component/checkbox_in_frame.cpp b/examples/component/checkbox_in_frame.cpp
index b0eb5e9a0..aa66be72c 100644
--- a/examples/component/checkbox_in_frame.cpp
+++ b/examples/component/checkbox_in_frame.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/checkbox.hpp"
 #include "ftxui/component/container.hpp"
 #include "ftxui/component/input.hpp"
diff --git a/examples/component/gallery.cpp b/examples/component/gallery.cpp
index dc6bf556c..360938c81 100644
--- a/examples/component/gallery.cpp
+++ b/examples/component/gallery.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/checkbox.hpp"
 #include "ftxui/component/container.hpp"
 #include "ftxui/component/input.hpp"
diff --git a/examples/component/homescreen.cpp b/examples/component/homescreen.cpp
index 10abfd1e6..b92856edf 100644
--- a/examples/component/homescreen.cpp
+++ b/examples/component/homescreen.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <cmath>
 #include <thread>
 
diff --git a/examples/component/input.cpp b/examples/component/input.cpp
index cfe5aa7a7..269fc1bff 100644
--- a/examples/component/input.cpp
+++ b/examples/component/input.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/input.hpp"
 
 #include <iostream>
diff --git a/examples/component/menu.cpp b/examples/component/menu.cpp
index 43afd4612..db8b96f4b 100644
--- a/examples/component/menu.cpp
+++ b/examples/component/menu.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/menu.hpp"
 
 #include <chrono>
diff --git a/examples/component/menu2.cpp b/examples/component/menu2.cpp
index d07885581..daf320350 100644
--- a/examples/component/menu2.cpp
+++ b/examples/component/menu2.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <chrono>
 #include <iostream>
 #include <thread>
diff --git a/examples/component/menu_style.cpp b/examples/component/menu_style.cpp
index ae3e4ae36..433c2349f 100644
--- a/examples/component/menu_style.cpp
+++ b/examples/component/menu_style.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 #include <thread>
 
diff --git a/examples/component/radiobox.cpp b/examples/component/radiobox.cpp
index 8a9dd7e23..46e106d8c 100644
--- a/examples/component/radiobox.cpp
+++ b/examples/component/radiobox.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/radiobox.hpp"
 
 #include "ftxui/component/component.hpp"
diff --git a/examples/component/radiobox_in_frame.cpp b/examples/component/radiobox_in_frame.cpp
index 7bcb2066e..ae40ac36a 100644
--- a/examples/component/radiobox_in_frame.cpp
+++ b/examples/component/radiobox_in_frame.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/checkbox.hpp"
 #include "ftxui/component/container.hpp"
 #include "ftxui/component/input.hpp"
diff --git a/examples/component/tab_horizontal.cpp b/examples/component/tab_horizontal.cpp
index d827505f6..77e689f8e 100644
--- a/examples/component/tab_horizontal.cpp
+++ b/examples/component/tab_horizontal.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 #include <thread>
 
diff --git a/examples/component/tab_vertical.cpp b/examples/component/tab_vertical.cpp
index 3fc480436..c8ad68984 100644
--- a/examples/component/tab_vertical.cpp
+++ b/examples/component/tab_vertical.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/component/container.hpp"
diff --git a/examples/component/toggle.cpp b/examples/component/toggle.cpp
index 6dc185a41..3844a596e 100644
--- a/examples/component/toggle.cpp
+++ b/examples/component/toggle.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/toggle.hpp"
 
 #include <chrono>
diff --git a/examples/dom/border.cpp b/examples/dom/border.cpp
index 0211d64fd..837f21969 100644
--- a/examples/dom/border.cpp
+++ b/examples/dom/border.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <chrono>
 #include <iostream>
 #include <thread>
diff --git a/examples/dom/dbox.cpp b/examples/dom/dbox.cpp
index 698af03fe..742c58ac7 100644
--- a/examples/dom/dbox.cpp
+++ b/examples/dom/dbox.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/gauge.cpp b/examples/dom/gauge.cpp
index 098137a3a..71684e677 100644
--- a/examples/dom/gauge.cpp
+++ b/examples/dom/gauge.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <chrono>
 #include <iostream>
 #include <thread>
diff --git a/examples/dom/graph.cpp b/examples/dom/graph.cpp
index e6d43c879..d59f9f614 100644
--- a/examples/dom/graph.cpp
+++ b/examples/dom/graph.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <chrono>
 #include <cmath>
 #include <iostream>
diff --git a/examples/dom/hflow.cpp b/examples/dom/hflow.cpp
index 99f2b4191..cc2fd0703 100644
--- a/examples/dom/hflow.cpp
+++ b/examples/dom/hflow.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/html_like.cpp b/examples/dom/html_like.cpp
index 318fde5b2..8b52a57f6 100644
--- a/examples/dom/html_like.cpp
+++ b/examples/dom/html_like.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <chrono>
 #include <iostream>
 #include <thread>
diff --git a/examples/dom/package_manager.cpp b/examples/dom/package_manager.cpp
index e3b99b4f2..fb6719fd4 100644
--- a/examples/dom/package_manager.cpp
+++ b/examples/dom/package_manager.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <chrono>
 #include <iostream>
 #include <list>
diff --git a/examples/dom/paragraph.cpp b/examples/dom/paragraph.cpp
index 614e68934..8b2da83eb 100644
--- a/examples/dom/paragraph.cpp
+++ b/examples/dom/paragraph.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/separator.cpp b/examples/dom/separator.cpp
index 8e69fa927..16f10f487 100644
--- a/examples/dom/separator.cpp
+++ b/examples/dom/separator.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/size.cpp b/examples/dom/size.cpp
index ec3cfe083..3cb9da6d7 100644
--- a/examples/dom/size.cpp
+++ b/examples/dom/size.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/spinner.cpp b/examples/dom/spinner.cpp
index cf26e704a..70c73db8d 100644
--- a/examples/dom/spinner.cpp
+++ b/examples/dom/spinner.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <chrono>
 #include <iostream>
 #include <thread>
diff --git a/examples/dom/style_blink.cpp b/examples/dom/style_blink.cpp
index a170d7744..5db769ad1 100644
--- a/examples/dom/style_blink.cpp
+++ b/examples/dom/style_blink.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/style_bold.cpp b/examples/dom/style_bold.cpp
index faf13b183..bc33097f4 100644
--- a/examples/dom/style_bold.cpp
+++ b/examples/dom/style_bold.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/style_color.cpp b/examples/dom/style_color.cpp
index 8d87eafee..06151bd54 100644
--- a/examples/dom/style_color.cpp
+++ b/examples/dom/style_color.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/style_dim.cpp b/examples/dom/style_dim.cpp
index eeee5af58..38e88a067 100644
--- a/examples/dom/style_dim.cpp
+++ b/examples/dom/style_dim.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/style_gallery.cpp b/examples/dom/style_gallery.cpp
index 4715baa80..c67a7fe4e 100644
--- a/examples/dom/style_gallery.cpp
+++ b/examples/dom/style_gallery.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/style_inverted.cpp b/examples/dom/style_inverted.cpp
index 0fc599d70..1395100b4 100644
--- a/examples/dom/style_inverted.cpp
+++ b/examples/dom/style_inverted.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/style_underlined.cpp b/examples/dom/style_underlined.cpp
index 9175c5c17..0f0184104 100644
--- a/examples/dom/style_underlined.cpp
+++ b/examples/dom/style_underlined.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/dom/vbox_hbox.cpp b/examples/dom/vbox_hbox.cpp
index 0d558125e..45adfc5c9 100644
--- a/examples/dom/vbox_hbox.cpp
+++ b/examples/dom/vbox_hbox.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <iostream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/examples/util/print_key_press.cpp b/examples/util/print_key_press.cpp
index dc8c968cc..86442ef3e 100644
--- a/examples/util/print_key_press.cpp
+++ b/examples/util/print_key_press.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <chrono>
 #include <iostream>
 #include <thread>
diff --git a/include/ftxui/component/checkbox.hpp b/include/ftxui/component/checkbox.hpp
index 7428e5320..1dcffeacb 100644
--- a/include/ftxui/component/checkbox.hpp
+++ b/include/ftxui/component/checkbox.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_CHECKBOX_HPP
 #define FTXUI_COMPONENT_CHECKBOX_HPP
 
diff --git a/include/ftxui/component/component.hpp b/include/ftxui/component/component.hpp
index c68ca667c..bd739f61d 100644
--- a/include/ftxui/component/component.hpp
+++ b/include/ftxui/component/component.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_COMPONENT_HPP
 #define FTXUI_COMPONENT_COMPONENT_HPP
 
diff --git a/include/ftxui/component/container.hpp b/include/ftxui/component/container.hpp
index 51395ed34..70fde1644 100644
--- a/include/ftxui/component/container.hpp
+++ b/include/ftxui/component/container.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_CONTAINER_HPP
 #define FTXUI_COMPONENT_CONTAINER_HPP
 
diff --git a/include/ftxui/component/event.hpp b/include/ftxui/component/event.hpp
index d02e9e082..f24082eea 100644
--- a/include/ftxui/component/event.hpp
+++ b/include/ftxui/component/event.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_EVENT_HPP
 #define FTXUI_COMPONENT_EVENT_HPP
 
diff --git a/include/ftxui/component/input.hpp b/include/ftxui/component/input.hpp
index f0c3245f6..712696f89 100644
--- a/include/ftxui/component/input.hpp
+++ b/include/ftxui/component/input.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_INPUT_H_
 #define FTXUI_COMPONENT_INPUT_H_
 
diff --git a/include/ftxui/component/menu.hpp b/include/ftxui/component/menu.hpp
index ca38ffdd6..91a709b9e 100644
--- a/include/ftxui/component/menu.hpp
+++ b/include/ftxui/component/menu.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_MENU
 #define FTXUI_COMPONENT_MENU
 
diff --git a/include/ftxui/component/radiobox.hpp b/include/ftxui/component/radiobox.hpp
index 1f15a7ecd..a938b1b77 100644
--- a/include/ftxui/component/radiobox.hpp
+++ b/include/ftxui/component/radiobox.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_RADIOBOX_HPP
 #define FTXUI_COMPONENT_RADIOBOX_HPP
 
diff --git a/include/ftxui/component/receiver.hpp b/include/ftxui/component/receiver.hpp
index e0ba5bb05..e1a1c2ccb 100644
--- a/include/ftxui/component/receiver.hpp
+++ b/include/ftxui/component/receiver.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_RECEIVER_HPP_
 #define FTXUI_COMPONENT_RECEIVER_HPP_
 
diff --git a/include/ftxui/component/screen_interactive.hpp b/include/ftxui/component/screen_interactive.hpp
index 3e0426bfb..7b9b75b9f 100644
--- a/include/ftxui/component/screen_interactive.hpp
+++ b/include/ftxui/component/screen_interactive.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_SCREEN_INTERACTIVE_HPP
 #define FTXUI_COMPONENT_SCREEN_INTERACTIVE_HPP
 
diff --git a/include/ftxui/component/toggle.hpp b/include/ftxui/component/toggle.hpp
index e93e4b34b..9747d6cda 100644
--- a/include/ftxui/component/toggle.hpp
+++ b/include/ftxui/component/toggle.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_COMPONENT_TOGGLE_H_
 #define FTXUI_COMPONENT_TOGGLE_H_
 
diff --git a/include/ftxui/dom/elements.hpp b/include/ftxui/dom/elements.hpp
index 6a6828d21..82d534cb9 100644
--- a/include/ftxui/dom/elements.hpp
+++ b/include/ftxui/dom/elements.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_DOM_ELEMENTS_HPP
 #define FTXUI_DOM_ELEMENTS_HPP
 
diff --git a/include/ftxui/dom/node.hpp b/include/ftxui/dom/node.hpp
index f54e6de99..2b8e34d02 100644
--- a/include/ftxui/dom/node.hpp
+++ b/include/ftxui/dom/node.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_DOM_NODE_HPP
 #define FTXUI_DOM_NODE_HPP
 
diff --git a/include/ftxui/dom/requirement.hpp b/include/ftxui/dom/requirement.hpp
index f2f74124c..701959c93 100644
--- a/include/ftxui/dom/requirement.hpp
+++ b/include/ftxui/dom/requirement.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_DOM_REQUIREMENT_HPP
 #define FTXUI_DOM_REQUIREMENT_HPP
 
diff --git a/include/ftxui/dom/take_any_args.hpp b/include/ftxui/dom/take_any_args.hpp
index e5db345ea..8de009b5f 100644
--- a/include/ftxui/dom/take_any_args.hpp
+++ b/include/ftxui/dom/take_any_args.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <type_traits>
 
 template <class T>
diff --git a/include/ftxui/screen/box.hpp b/include/ftxui/screen/box.hpp
index e020b642f..aaa9f4562 100644
--- a/include/ftxui/screen/box.hpp
+++ b/include/ftxui/screen/box.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_SCREEN_BOX_HPP
 #define FTXUI_SCREEN_BOX_HPP
 
diff --git a/include/ftxui/screen/color.hpp b/include/ftxui/screen/color.hpp
index b895fa85c..d518bb022 100644
--- a/include/ftxui/screen/color.hpp
+++ b/include/ftxui/screen/color.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_SCREEN_COLOR
 #define FTXUI_SCREEN_COLOR
 
diff --git a/include/ftxui/screen/screen.hpp b/include/ftxui/screen/screen.hpp
index b53956cf6..a5cacef6f 100644
--- a/include/ftxui/screen/screen.hpp
+++ b/include/ftxui/screen/screen.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_SCREEN_SCREEN
 #define FTXUI_SCREEN_SCREEN
 
diff --git a/include/ftxui/screen/string.hpp b/include/ftxui/screen/string.hpp
index 1a1785ad7..b904f41bf 100644
--- a/include/ftxui/screen/string.hpp
+++ b/include/ftxui/screen/string.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_SCREEN_STRING_HPP
 #define FTXUI_SCREEN_STRING_HPP
 
diff --git a/include/ftxui/util/autoreset.hpp b/include/ftxui/util/autoreset.hpp
index c371f0392..aa09c000e 100644
--- a/include/ftxui/util/autoreset.hpp
+++ b/include/ftxui/util/autoreset.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_UTIL_AUTORESET_HPP
 #define FTXUI_UTIL_AUTORESET_HPP
 
diff --git a/other/format.sh b/other/format.sh
new file mode 100755
index 000000000..e8b31407c
--- /dev/null
+++ b/other/format.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+cd "$(dirname "$0")"
+cd ..
+
+# Add the license file.
+files=$(find ./src ./include ./examples  -name "*.hpp" -o -name "*.cpp")
+for file in $files
+do
+  if ! grep -q Copyright $file
+  then
+    cat ./other/license_headers.cpp $file >$file.new && mv $file.new $file
+  fi
+done
+
+# Use clang-format.
+for file in $files
+do
+  clang-format -i $file
+done
diff --git a/other/license_headers.cpp b/other/license_headers.cpp
new file mode 100644
index 000000000..81c04074f
--- /dev/null
+++ b/other/license_headers.cpp
@@ -0,0 +1,4 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
diff --git a/src/ftxui/component/checkbox.cpp b/src/ftxui/component/checkbox.cpp
index 6e88987de..86e5dfb9f 100644
--- a/src/ftxui/component/checkbox.cpp
+++ b/src/ftxui/component/checkbox.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/checkbox.hpp"
 
 #include <functional>
diff --git a/src/ftxui/component/component.cpp b/src/ftxui/component/component.cpp
index e194138e6..fa07cc14c 100644
--- a/src/ftxui/component/component.cpp
+++ b/src/ftxui/component/component.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/component.hpp"
 
 #include <assert.h>
diff --git a/src/ftxui/component/container.cpp b/src/ftxui/component/container.cpp
index b4b26c5c3..1fdb47e01 100644
--- a/src/ftxui/component/container.cpp
+++ b/src/ftxui/component/container.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/container.hpp"
 
 #include <algorithm>
diff --git a/src/ftxui/component/container_test.cpp b/src/ftxui/component/container_test.cpp
index bcab985d2..a8c6e6b36 100644
--- a/src/ftxui/component/container_test.cpp
+++ b/src/ftxui/component/container_test.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/container.hpp"
 
 #include "gtest/gtest.h"
diff --git a/src/ftxui/component/event.cpp b/src/ftxui/component/event.cpp
index a4c08df7d..f595846de 100644
--- a/src/ftxui/component/event.cpp
+++ b/src/ftxui/component/event.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/event.hpp"
 
 #include <iostream>
diff --git a/src/ftxui/component/input.cpp b/src/ftxui/component/input.cpp
index ac3baa4fd..f5d6f63b7 100644
--- a/src/ftxui/component/input.cpp
+++ b/src/ftxui/component/input.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/input.hpp"
 
 #include <algorithm>
diff --git a/src/ftxui/component/menu.cpp b/src/ftxui/component/menu.cpp
index e949552c2..321edbb79 100644
--- a/src/ftxui/component/menu.cpp
+++ b/src/ftxui/component/menu.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/menu.hpp"
 
 #include <algorithm>
diff --git a/src/ftxui/component/radiobox.cpp b/src/ftxui/component/radiobox.cpp
index d09821087..6e89d956c 100644
--- a/src/ftxui/component/radiobox.cpp
+++ b/src/ftxui/component/radiobox.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/radiobox.hpp"
 
 #include <algorithm>
diff --git a/src/ftxui/component/radiobox_test.cpp b/src/ftxui/component/radiobox_test.cpp
index 593cacd92..22a75660e 100644
--- a/src/ftxui/component/radiobox_test.cpp
+++ b/src/ftxui/component/radiobox_test.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/radiobox.hpp"
 
 #include "gtest/gtest.h"
diff --git a/src/ftxui/component/receiver_test.cpp b/src/ftxui/component/receiver_test.cpp
index 530563100..7cdd513fe 100644
--- a/src/ftxui/component/receiver_test.cpp
+++ b/src/ftxui/component/receiver_test.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/receiver.hpp"
 
 #include <thread>
diff --git a/src/ftxui/component/screen_interactive.cpp b/src/ftxui/component/screen_interactive.cpp
index ff29ccf6f..3eef2262f 100644
--- a/src/ftxui/component/screen_interactive.cpp
+++ b/src/ftxui/component/screen_interactive.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/screen_interactive.hpp"
 
 #include <stdio.h>
diff --git a/src/ftxui/component/toggle.cpp b/src/ftxui/component/toggle.cpp
index 8586f7050..840377712 100644
--- a/src/ftxui/component/toggle.cpp
+++ b/src/ftxui/component/toggle.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/toggle.hpp"
 
 #include <algorithm>
diff --git a/src/ftxui/component/toggle_test.cpp b/src/ftxui/component/toggle_test.cpp
index c806c9d05..c9692d1b5 100644
--- a/src/ftxui/component/toggle_test.cpp
+++ b/src/ftxui/component/toggle_test.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/component/toggle.hpp"
 
 #include "gtest/gtest.h"
diff --git a/src/ftxui/dom/blink.cpp b/src/ftxui/dom/blink.cpp
index 89b4e0eb0..4fa58e6aa 100644
--- a/src/ftxui/dom/blink.cpp
+++ b/src/ftxui/dom/blink.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node_decorator.hpp"
 
diff --git a/src/ftxui/dom/bold.cpp b/src/ftxui/dom/bold.cpp
index 175b9011d..ae40c4e0c 100644
--- a/src/ftxui/dom/bold.cpp
+++ b/src/ftxui/dom/bold.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node_decorator.hpp"
 
diff --git a/src/ftxui/dom/border.cpp b/src/ftxui/dom/border.cpp
index 7ef1b6eb3..2ce263061 100644
--- a/src/ftxui/dom/border.cpp
+++ b/src/ftxui/dom/border.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <algorithm>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/src/ftxui/dom/color.cpp b/src/ftxui/dom/color.cpp
index 1b45c1984..dc2ced280 100644
--- a/src/ftxui/dom/color.cpp
+++ b/src/ftxui/dom/color.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node_decorator.hpp"
 
diff --git a/src/ftxui/dom/composite_decorator.cpp b/src/ftxui/dom/composite_decorator.cpp
index c4214efa6..5479fceef 100644
--- a/src/ftxui/dom/composite_decorator.cpp
+++ b/src/ftxui/dom/composite_decorator.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node.hpp"
 
diff --git a/src/ftxui/dom/dbox.cpp b/src/ftxui/dom/dbox.cpp
index 50b6641ab..abd7847af 100644
--- a/src/ftxui/dom/dbox.cpp
+++ b/src/ftxui/dom/dbox.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <algorithm>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/src/ftxui/dom/dim.cpp b/src/ftxui/dom/dim.cpp
index 1845e1ef3..ce1c51bed 100644
--- a/src/ftxui/dom/dim.cpp
+++ b/src/ftxui/dom/dim.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node_decorator.hpp"
 
diff --git a/src/ftxui/dom/flex.cpp b/src/ftxui/dom/flex.cpp
index a12496bf2..b6bd879fb 100644
--- a/src/ftxui/dom/flex.cpp
+++ b/src/ftxui/dom/flex.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node.hpp"
 
diff --git a/src/ftxui/dom/frame.cpp b/src/ftxui/dom/frame.cpp
index c215775c1..5ea53ab9d 100644
--- a/src/ftxui/dom/frame.cpp
+++ b/src/ftxui/dom/frame.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <algorithm>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/src/ftxui/dom/gauge.cpp b/src/ftxui/dom/gauge.cpp
index 588cbe0b6..494c22716 100644
--- a/src/ftxui/dom/gauge.cpp
+++ b/src/ftxui/dom/gauge.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node.hpp"
 
diff --git a/src/ftxui/dom/gauge_test.cpp b/src/ftxui/dom/gauge_test.cpp
index 328b0579b..0e702a752 100644
--- a/src/ftxui/dom/gauge_test.cpp
+++ b/src/ftxui/dom/gauge_test.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/screen/screen.hpp"
 #include "gtest/gtest.h"
diff --git a/src/ftxui/dom/graph.cpp b/src/ftxui/dom/graph.cpp
index 520dd38cf..e466ac80e 100644
--- a/src/ftxui/dom/graph.cpp
+++ b/src/ftxui/dom/graph.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 
 namespace ftxui {
diff --git a/src/ftxui/dom/hbox.cpp b/src/ftxui/dom/hbox.cpp
index efc0a3f8a..8bd5f6a73 100644
--- a/src/ftxui/dom/hbox.cpp
+++ b/src/ftxui/dom/hbox.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <algorithm>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/src/ftxui/dom/hbox_test.cpp b/src/ftxui/dom/hbox_test.cpp
index bca1c196e..7c7ac1651 100644
--- a/src/ftxui/dom/hbox_test.cpp
+++ b/src/ftxui/dom/hbox_test.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/screen/screen.hpp"
 #include "gtest/gtest.h"
diff --git a/src/ftxui/dom/hflow.cpp b/src/ftxui/dom/hflow.cpp
index 3aacf62ff..7bb068c84 100644
--- a/src/ftxui/dom/hflow.cpp
+++ b/src/ftxui/dom/hflow.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <algorithm>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/src/ftxui/dom/inverted.cpp b/src/ftxui/dom/inverted.cpp
index c0a34f804..f3149d580 100644
--- a/src/ftxui/dom/inverted.cpp
+++ b/src/ftxui/dom/inverted.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node_decorator.hpp"
 
diff --git a/src/ftxui/dom/node.cpp b/src/ftxui/dom/node.cpp
index a5cb1a4fd..c9da8647c 100644
--- a/src/ftxui/dom/node.cpp
+++ b/src/ftxui/dom/node.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/node.hpp"
 
 namespace ftxui {
diff --git a/src/ftxui/dom/node_decorator.cpp b/src/ftxui/dom/node_decorator.cpp
index f690e572a..f62c91870 100644
--- a/src/ftxui/dom/node_decorator.cpp
+++ b/src/ftxui/dom/node_decorator.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/node_decorator.hpp"
 
 namespace ftxui {
diff --git a/src/ftxui/dom/node_decorator.hpp b/src/ftxui/dom/node_decorator.hpp
index 1b7dae70e..83679ac69 100644
--- a/src/ftxui/dom/node_decorator.hpp
+++ b/src/ftxui/dom/node_decorator.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_DOM_NODE_DECORATOR_H_
 #define FTXUI_DOM_NODE_DECORATOR_H_
 
diff --git a/src/ftxui/dom/paragraph.cpp b/src/ftxui/dom/paragraph.cpp
index 220705d1a..2c5d9cf3c 100644
--- a/src/ftxui/dom/paragraph.cpp
+++ b/src/ftxui/dom/paragraph.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <sstream>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/src/ftxui/dom/separator.cpp b/src/ftxui/dom/separator.cpp
index 0c863272b..5c9f48b10 100644
--- a/src/ftxui/dom/separator.cpp
+++ b/src/ftxui/dom/separator.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/node.hpp"
 
 namespace ftxui {
diff --git a/src/ftxui/dom/size.cpp b/src/ftxui/dom/size.cpp
index d5a167a87..b0af31237 100644
--- a/src/ftxui/dom/size.cpp
+++ b/src/ftxui/dom/size.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <algorithm>
 
 #include "ftxui/dom/elements.hpp"
diff --git a/src/ftxui/dom/spinner.cpp b/src/ftxui/dom/spinner.cpp
index e4f0c3c93..d90577e39 100644
--- a/src/ftxui/dom/spinner.cpp
+++ b/src/ftxui/dom/spinner.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node.hpp"
 
diff --git a/src/ftxui/dom/text.cpp b/src/ftxui/dom/text.cpp
index e58a1e179..7b797d12d 100644
--- a/src/ftxui/dom/text.cpp
+++ b/src/ftxui/dom/text.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/node.hpp"
 #include "ftxui/screen/string.hpp"
 
diff --git a/src/ftxui/dom/text_test.cpp b/src/ftxui/dom/text_test.cpp
index c1d99f6d2..f8616e22b 100644
--- a/src/ftxui/dom/text_test.cpp
+++ b/src/ftxui/dom/text_test.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/screen/screen.hpp"
 #include "gtest/gtest.h"
diff --git a/src/ftxui/dom/underlined.cpp b/src/ftxui/dom/underlined.cpp
index 9870cfc90..edded6a18 100644
--- a/src/ftxui/dom/underlined.cpp
+++ b/src/ftxui/dom/underlined.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/dom/node_decorator.hpp"
 
diff --git a/src/ftxui/dom/util.cpp b/src/ftxui/dom/util.cpp
index febb4cf1e..d5f467252 100644
--- a/src/ftxui/dom/util.cpp
+++ b/src/ftxui/dom/util.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 
 namespace ftxui {
diff --git a/src/ftxui/dom/vbox.cpp b/src/ftxui/dom/vbox.cpp
index 25e069792..b355171f7 100644
--- a/src/ftxui/dom/vbox.cpp
+++ b/src/ftxui/dom/vbox.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include <algorithm>
 #include <iostream>
 
diff --git a/src/ftxui/dom/vbox_test.cpp b/src/ftxui/dom/vbox_test.cpp
index 3da7784f6..124580682 100644
--- a/src/ftxui/dom/vbox_test.cpp
+++ b/src/ftxui/dom/vbox_test.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/screen/screen.hpp"
 #include "gtest/gtest.h"
diff --git a/src/ftxui/screen/box.cpp b/src/ftxui/screen/box.cpp
index baf0f4675..05f5a2930 100644
--- a/src/ftxui/screen/box.cpp
+++ b/src/ftxui/screen/box.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/screen/box.hpp"
 
 #include <algorithm>
diff --git a/src/ftxui/screen/screen.cpp b/src/ftxui/screen/screen.cpp
index 42e46c0e7..17450226e 100644
--- a/src/ftxui/screen/screen.cpp
+++ b/src/ftxui/screen/screen.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/screen/screen.hpp"
 
 #include <algorithm>
diff --git a/src/ftxui/screen/string.cpp b/src/ftxui/screen/string.cpp
index 46a029e22..8cf4c912c 100644
--- a/src/ftxui/screen/string.cpp
+++ b/src/ftxui/screen/string.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/screen/string.hpp"
 
 #include <codecvt>
diff --git a/src/ftxui/screen/terminal.cpp b/src/ftxui/screen/terminal.cpp
index 0598667e2..2c5f07f15 100644
--- a/src/ftxui/screen/terminal.cpp
+++ b/src/ftxui/screen/terminal.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #include "ftxui/screen/terminal.hpp"
 
 #include <stdio.h>
diff --git a/src/ftxui/screen/terminal.hpp b/src/ftxui/screen/terminal.hpp
index 2310bacf7..8e2959637 100644
--- a/src/ftxui/screen/terminal.hpp
+++ b/src/ftxui/screen/terminal.hpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 #ifndef FTXUI_CORE_TERMINAL_HPP
 #define FTXUI_CORE_TERMINAL_HPP
 
diff --git a/src/ftxui/screen/wcwidth.cpp b/src/ftxui/screen/wcwidth.cpp
index b47edb1c2..0e6995942 100644
--- a/src/ftxui/screen/wcwidth.cpp
+++ b/src/ftxui/screen/wcwidth.cpp
@@ -1,3 +1,7 @@
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
 /*
  * This is an implementation of wcwidth() and wcswidth() (defined in
  * IEEE Std 1002.1-2001) for Unicode.