diff --git a/example/src/game.cpp b/example/src/game.cpp
index cf008e6..ad3e81c 100644
--- a/example/src/game.cpp
+++ b/example/src/game.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "inferno.h"
 #include "inferno/entrypoint.h"
 
diff --git a/src/inferno/application.cpp b/src/inferno/application.cpp
index 963db64..79e22b3 100644
--- a/src/inferno/application.cpp
+++ b/src/inferno/application.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "glm/gtc/type_ptr.hpp" // glm::make_mat4
 #include "ruc/format/log.h"
 #include "ruc/meta/assert.h"
diff --git a/src/inferno/application.h b/src/inferno/application.h
index 2349971..cce08cc 100644
--- a/src/inferno/application.h
+++ b/src/inferno/application.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <memory> // std::unique_ptr, std::shared_ptr
diff --git a/src/inferno/component/cameracomponent.h b/src/inferno/component/cameracomponent.h
index d31eeb5..1c56bd0 100644
--- a/src/inferno/component/cameracomponent.h
+++ b/src/inferno/component/cameracomponent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include "glm/ext/matrix_float4x4.hpp" // glm::mat4
diff --git a/src/inferno/component/luascriptcomponent.h b/src/inferno/component/luascriptcomponent.h
index 6d22715..c0b4ff3 100644
--- a/src/inferno/component/luascriptcomponent.h
+++ b/src/inferno/component/luascriptcomponent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <string>  // std::string
diff --git a/src/inferno/component/nativescriptcomponent.h b/src/inferno/component/nativescriptcomponent.h
index 5173fc6..efa71a8 100644
--- a/src/inferno/component/nativescriptcomponent.h
+++ b/src/inferno/component/nativescriptcomponent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include "ruc/meta/assert.h"
diff --git a/src/inferno/component/spritecomponent.h b/src/inferno/component/spritecomponent.h
index c1d749a..608d8d2 100644
--- a/src/inferno/component/spritecomponent.h
+++ b/src/inferno/component/spritecomponent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <memory> // std::shared_ptr
diff --git a/src/inferno/component/tagcomponent.h b/src/inferno/component/tagcomponent.h
index 1570b65..4deef69 100644
--- a/src/inferno/component/tagcomponent.h
+++ b/src/inferno/component/tagcomponent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <string>  // std::string
diff --git a/src/inferno/component/textareacomponent.h b/src/inferno/component/textareacomponent.h
index 2a6dfb8..c7a1422 100644
--- a/src/inferno/component/textareacomponent.h
+++ b/src/inferno/component/textareacomponent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint> // uint32_t
diff --git a/src/inferno/component/transformcomponent.cpp b/src/inferno/component/transformcomponent.cpp
index 5b710a4..1147f91 100644
--- a/src/inferno/component/transformcomponent.cpp
+++ b/src/inferno/component/transformcomponent.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "inferno/component/transformcomponent.h"
 
 void ruc::format::Formatter<glm::vec2>::format(Builder& builder, glm::vec2 value) const
diff --git a/src/inferno/component/transformcomponent.h b/src/inferno/component/transformcomponent.h
index 58b1375..37d539f 100644
--- a/src/inferno/component/transformcomponent.h
+++ b/src/inferno/component/transformcomponent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include "glm/ext/matrix_float4x4.hpp" // glm::mat4
diff --git a/src/inferno/core.h b/src/inferno/core.h
index 42ad1da..5d6b78e 100644
--- a/src/inferno/core.h
+++ b/src/inferno/core.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <functional> // std::bind, std::placeholders
diff --git a/src/inferno/entrypoint.h b/src/inferno/entrypoint.h
index f11c841..6fcc17d 100644
--- a/src/inferno/entrypoint.h
+++ b/src/inferno/entrypoint.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 /*
  * `m_` for member variables,
  * `s_` for static variables,
diff --git a/src/inferno/event/applicationevent.h b/src/inferno/event/applicationevent.h
index 1546c08..f4085c1 100644
--- a/src/inferno/event/applicationevent.h
+++ b/src/inferno/event/applicationevent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <sstream> // std::stringstream
diff --git a/src/inferno/event/event.h b/src/inferno/event/event.h
index 322c51f..b599e1c 100644
--- a/src/inferno/event/event.h
+++ b/src/inferno/event/event.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <ostream> // std::ostream
diff --git a/src/inferno/event/joystickevent.h b/src/inferno/event/joystickevent.h
index 4677ce0..2d6efe7 100644
--- a/src/inferno/event/joystickevent.h
+++ b/src/inferno/event/joystickevent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <sstream> // std::stringstream
diff --git a/src/inferno/event/keyevent.h b/src/inferno/event/keyevent.h
index 7f0e1b1..9427210 100644
--- a/src/inferno/event/keyevent.h
+++ b/src/inferno/event/keyevent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <sstream> // std::stringstream
diff --git a/src/inferno/event/mouseevent.h b/src/inferno/event/mouseevent.h
index 41e8548..1d2d874 100644
--- a/src/inferno/event/mouseevent.h
+++ b/src/inferno/event/mouseevent.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <sstream> // std::stringstream
diff --git a/src/inferno/io/gltffile.cpp b/src/inferno/io/gltffile.cpp
index 2e18b65..f7e736d 100644
--- a/src/inferno/io/gltffile.cpp
+++ b/src/inferno/io/gltffile.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include <cstring> // strcmp ??
 #include <fstream> // std::ifstream
 #include <ios>     // std::ios
diff --git a/src/inferno/io/gltffile.h b/src/inferno/io/gltffile.h
index 225a2e5..e0cee66 100644
--- a/src/inferno/io/gltffile.h
+++ b/src/inferno/io/gltffile.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint> // uint32_t
diff --git a/src/inferno/io/input.cpp b/src/inferno/io/input.cpp
index ff9951c..24e7b6a 100644
--- a/src/inferno/io/input.cpp
+++ b/src/inferno/io/input.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "GLFW/glfw3.h"
 #include "ruc/format/log.h"
 
diff --git a/src/inferno/io/input.h b/src/inferno/io/input.h
index 760ef33..16ca4b1 100644
--- a/src/inferno/io/input.h
+++ b/src/inferno/io/input.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <utility> // std::pair
diff --git a/src/inferno/keycodes.cpp b/src/inferno/keycodes.cpp
index 6f550b1..07f9ab8 100644
--- a/src/inferno/keycodes.cpp
+++ b/src/inferno/keycodes.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include <algorithm> // std::find_if
 #include <string_view>
 #include <unordered_map> // std::unordered_map
diff --git a/src/inferno/keycodes.h b/src/inferno/keycodes.h
index 2f24f75..015a1e8 100644
--- a/src/inferno/keycodes.h
+++ b/src/inferno/keycodes.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <string_view>
diff --git a/src/inferno/render/buffer.cpp b/src/inferno/render/buffer.cpp
index 6586b2a..01904c0 100644
--- a/src/inferno/render/buffer.cpp
+++ b/src/inferno/render/buffer.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "glad/glad.h"
 
 #include "inferno/core.h"
diff --git a/src/inferno/render/buffer.h b/src/inferno/render/buffer.h
index 1ff1d89..70f7fc4 100644
--- a/src/inferno/render/buffer.h
+++ b/src/inferno/render/buffer.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstddef> // size_t
diff --git a/src/inferno/render/context.cpp b/src/inferno/render/context.cpp
index 9074c7a..7513a48 100644
--- a/src/inferno/render/context.cpp
+++ b/src/inferno/render/context.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 // clang-format off
 #include "glad/glad.h" // glad needs to come before GLFW
 #include "GLFW/glfw3.h"
diff --git a/src/inferno/render/context.h b/src/inferno/render/context.h
index ecd91d1..ba0dbc4 100644
--- a/src/inferno/render/context.h
+++ b/src/inferno/render/context.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 struct GLFWwindow;
diff --git a/src/inferno/render/font.cpp b/src/inferno/render/font.cpp
index fcf121c..3e5838b 100644
--- a/src/inferno/render/font.cpp
+++ b/src/inferno/render/font.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include <limits>  // std::numeric_limits
 #include <string>  // std::getline, std::stoi
 #include <utility> // std::move
diff --git a/src/inferno/render/font.h b/src/inferno/render/font.h
index b3035da..d719d7e 100644
--- a/src/inferno/render/font.h
+++ b/src/inferno/render/font.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint>       // int32_t, uint32_t
diff --git a/src/inferno/render/framebuffer.cpp b/src/inferno/render/framebuffer.cpp
index c40e935..063396e 100644
--- a/src/inferno/render/framebuffer.cpp
+++ b/src/inferno/render/framebuffer.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "inferno/render/framebuffer.h"
 
 namespace Inferno {
diff --git a/src/inferno/render/framebuffer.h b/src/inferno/render/framebuffer.h
index 7d5c955..bc8a147 100644
--- a/src/inferno/render/framebuffer.h
+++ b/src/inferno/render/framebuffer.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 namespace Inferno {
diff --git a/src/inferno/render/gltf.cpp b/src/inferno/render/gltf.cpp
index e13dfa5..8de44ed 100644
--- a/src/inferno/render/gltf.cpp
+++ b/src/inferno/render/gltf.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #if 0
 	#include <algorithm> // std::copy
 	#include <utility>   // std::move
diff --git a/src/inferno/render/gltf.h b/src/inferno/render/gltf.h
index 2e14ccf..5d6da52 100644
--- a/src/inferno/render/gltf.h
+++ b/src/inferno/render/gltf.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #if 0
diff --git a/src/inferno/render/renderer.cpp b/src/inferno/render/renderer.cpp
index 3620490..9af41fd 100644
--- a/src/inferno/render/renderer.cpp
+++ b/src/inferno/render/renderer.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include <algorithm> // std::min
 #include <utility>   // std::move
 
diff --git a/src/inferno/render/renderer.h b/src/inferno/render/renderer.h
index d8578e2..a63ab57 100644
--- a/src/inferno/render/renderer.h
+++ b/src/inferno/render/renderer.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint> // int32_t, uint32_t
diff --git a/src/inferno/render/renderer3d.cpp b/src/inferno/render/renderer3d.cpp
index 947ba6a..30efd20 100644
--- a/src/inferno/render/renderer3d.cpp
+++ b/src/inferno/render/renderer3d.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "inferno/render/renderer3d.h"
 
 namespace Inferno {
diff --git a/src/inferno/render/renderer3d.h b/src/inferno/render/renderer3d.h
index f1834ce..e0b1159 100644
--- a/src/inferno/render/renderer3d.h
+++ b/src/inferno/render/renderer3d.h
@@ -1,22 +1,7 @@
 /*
- * Copyright (C) 2021 Riyyi
+ * Copyright (C) 2022 Riyyi
  *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
- * the Software, and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
- * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * SPDX-License-Identifier: MIT
  */
 
 #pragma once
diff --git a/src/inferno/render/shader.cpp b/src/inferno/render/shader.cpp
index deda5e0..859cd89 100644
--- a/src/inferno/render/shader.cpp
+++ b/src/inferno/render/shader.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include <utility> // std::move
 #include <vector>  // std::vector
 
diff --git a/src/inferno/render/shader.h b/src/inferno/render/shader.h
index 7bd23d3..41ad245 100644
--- a/src/inferno/render/shader.h
+++ b/src/inferno/render/shader.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint>       // int32_t, uint32_t
diff --git a/src/inferno/render/texture.cpp b/src/inferno/render/texture.cpp
index edcecc1..e3125bd 100644
--- a/src/inferno/render/texture.cpp
+++ b/src/inferno/render/texture.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include <climits> // UINT_MAX
 #include <memory>  // std::shared_ptr
 #include <utility> // std::move
diff --git a/src/inferno/render/texture.h b/src/inferno/render/texture.h
index 58cb1ac..ca57190 100644
--- a/src/inferno/render/texture.h
+++ b/src/inferno/render/texture.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint>       // uint32_t
diff --git a/src/inferno/scene/scene.cpp b/src/inferno/scene/scene.cpp
index 73554ed..492a2ee 100644
--- a/src/inferno/scene/scene.cpp
+++ b/src/inferno/scene/scene.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "ruc/format/log.h"
 #include "ruc/meta/assert.h"
 
diff --git a/src/inferno/scene/scene.h b/src/inferno/scene/scene.h
index 5740d69..9cf2d4d 100644
--- a/src/inferno/scene/scene.h
+++ b/src/inferno/scene/scene.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint> // uint32_t
diff --git a/src/inferno/script/cameracontroller.cpp b/src/inferno/script/cameracontroller.cpp
index d72aea4..ec4281d 100644
--- a/src/inferno/script/cameracontroller.cpp
+++ b/src/inferno/script/cameracontroller.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "glm/ext/matrix_transform.hpp" // glm::radians
 
 #include "inferno/component/cameracomponent.h"
diff --git a/src/inferno/script/cameracontroller.h b/src/inferno/script/cameracontroller.h
index 85e7882..4b9ba28 100644
--- a/src/inferno/script/cameracontroller.h
+++ b/src/inferno/script/cameracontroller.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include "inferno/component/cameracomponent.h"
diff --git a/src/inferno/script/luascript.cpp b/src/inferno/script/luascript.cpp
index bbef506..25a6eed 100644
--- a/src/inferno/script/luascript.cpp
+++ b/src/inferno/script/luascript.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "ruc/file.h"
 #include "sol/unsafe_function_result.hpp"
 
diff --git a/src/inferno/script/luascript.h b/src/inferno/script/luascript.h
index bce542b..251e50d 100644
--- a/src/inferno/script/luascript.h
+++ b/src/inferno/script/luascript.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint> // uint32_t
diff --git a/src/inferno/script/nativescript.h b/src/inferno/script/nativescript.h
index 2263972..b39ffaf 100644
--- a/src/inferno/script/nativescript.h
+++ b/src/inferno/script/nativescript.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include "inferno/scene/scene.h"
diff --git a/src/inferno/script/registration.cpp b/src/inferno/script/registration.cpp
index 7a5b1c3..e21cbb5 100644
--- a/src/inferno/script/registration.cpp
+++ b/src/inferno/script/registration.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "glm/ext/matrix_transform.hpp" // glm::radians
 #include "glm/ext/vector_float2.hpp"    // glm::vec2
 #include "glm/ext/vector_float3.hpp"    // glm::vec3
diff --git a/src/inferno/script/registration.h b/src/inferno/script/registration.h
index 8c14e74..8f58cfe 100644
--- a/src/inferno/script/registration.h
+++ b/src/inferno/script/registration.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include "ruc/format/format.h"
diff --git a/src/inferno/settings.cpp b/src/inferno/settings.cpp
index ee7c9b8..82102ec 100644
--- a/src/inferno/settings.cpp
+++ b/src/inferno/settings.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include <cstdint> // uint32_t
 #include <string>  // std::string
 
diff --git a/src/inferno/settings.h b/src/inferno/settings.h
index bd32532..19acbe5 100644
--- a/src/inferno/settings.h
+++ b/src/inferno/settings.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include "ruc/json/json.h"
diff --git a/src/inferno/system/camerasystem.cpp b/src/inferno/system/camerasystem.cpp
index 452d963..d3d7d42 100644
--- a/src/inferno/system/camerasystem.cpp
+++ b/src/inferno/system/camerasystem.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "glm/ext/matrix_clip_space.hpp" // glm::perspective, glm::ortho
 #include "glm/ext/matrix_transform.hpp"  // glm::radians, glm::lookAt
 #include "ruc/format/log.h"
diff --git a/src/inferno/system/camerasystem.h b/src/inferno/system/camerasystem.h
index b1e8474..d08c0d6 100644
--- a/src/inferno/system/camerasystem.h
+++ b/src/inferno/system/camerasystem.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <memory> //std::shared_ptr
diff --git a/src/inferno/system/rendersystem.cpp b/src/inferno/system/rendersystem.cpp
index 1122e6e..3d33c84 100644
--- a/src/inferno/system/rendersystem.cpp
+++ b/src/inferno/system/rendersystem.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "glm/ext/matrix_transform.hpp" // glm::translate, glm::rotate, glm::scale, glm::radians
 #include "ruc/format/log.h"
 
diff --git a/src/inferno/system/rendersystem.h b/src/inferno/system/rendersystem.h
index 0b0cdc9..d074f0f 100644
--- a/src/inferno/system/rendersystem.h
+++ b/src/inferno/system/rendersystem.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <memory> //std::shared_ptr
diff --git a/src/inferno/system/scriptsystem.cpp b/src/inferno/system/scriptsystem.cpp
index d26174e..0b08e77 100644
--- a/src/inferno/system/scriptsystem.cpp
+++ b/src/inferno/system/scriptsystem.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "entt/entity/registry.hpp" // entt::entity, entt::registry
 #include "ruc/format/log.h"
 
diff --git a/src/inferno/system/scriptsystem.h b/src/inferno/system/scriptsystem.h
index 4a6451e..6dbc5a4 100644
--- a/src/inferno/system/scriptsystem.h
+++ b/src/inferno/system/scriptsystem.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint> // uint32_t
diff --git a/src/inferno/system/textareasystem.cpp b/src/inferno/system/textareasystem.cpp
index 6d3fbcc..3ac9f95 100644
--- a/src/inferno/system/textareasystem.cpp
+++ b/src/inferno/system/textareasystem.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "ruc/format/log.h"
 #include "ruc/meta/assert.h"
 
diff --git a/src/inferno/system/textareasystem.h b/src/inferno/system/textareasystem.h
index 9c546e0..21fe363 100644
--- a/src/inferno/system/textareasystem.h
+++ b/src/inferno/system/textareasystem.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint>  // std::uint32_t
diff --git a/src/inferno/system/transformsystem.cpp b/src/inferno/system/transformsystem.cpp
index 9a9917f..3443f44 100644
--- a/src/inferno/system/transformsystem.cpp
+++ b/src/inferno/system/transformsystem.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "glm/ext/matrix_transform.hpp" // glm::translate, glm::rotate, glm::scale, glm::radians
 #include "ruc/format/log.h"
 
diff --git a/src/inferno/system/transformsystem.h b/src/inferno/system/transformsystem.h
index 1fdac51..b6e6b79 100644
--- a/src/inferno/system/transformsystem.h
+++ b/src/inferno/system/transformsystem.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <memory> // std::shared_ptr
diff --git a/src/inferno/time.cpp b/src/inferno/time.cpp
index 5c7c03e..22e8b1c 100644
--- a/src/inferno/time.cpp
+++ b/src/inferno/time.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include "GLFW/glfw3.h"
 
 #include "inferno/time.h"
diff --git a/src/inferno/time.h b/src/inferno/time.h
index d4f2b90..e944bf4 100644
--- a/src/inferno/time.h
+++ b/src/inferno/time.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 namespace Inferno {
diff --git a/src/inferno/util/integer.h b/src/inferno/util/integer.h
index 0e68617..d40ab58 100644
--- a/src/inferno/util/integer.h
+++ b/src/inferno/util/integer.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint> // uint32_t
diff --git a/src/inferno/util/json.h b/src/inferno/util/json.h
index c6579d2..37e5f4b 100644
--- a/src/inferno/util/json.h
+++ b/src/inferno/util/json.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #if 0
diff --git a/src/inferno/window.cpp b/src/inferno/window.cpp
index bd57720..9e3c2ce 100644
--- a/src/inferno/window.cpp
+++ b/src/inferno/window.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #include <csignal> // signal
 
 #include "GLFW/glfw3.h"
diff --git a/src/inferno/window.h b/src/inferno/window.h
index 583631e..b7b4fde 100644
--- a/src/inferno/window.h
+++ b/src/inferno/window.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <cstdint>    // uint32_t