diff --git a/LICENSE b/LICENSE
index e69de29..2f0b157 100644
--- a/LICENSE
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 akku--n11
+
+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.
diff --git a/README b/README
index eda58a3..c95f45d 100644
--- a/README
+++ b/README
@@ -9,6 +9,10 @@ https://scratch.mit.edu/discuss/post/6736707/
   scriptタグもありません。
   (これに起因する問題もある)
 ・文字コードは UTF-8、改行コードはLFになっています。
+・著作権はakku--n11に帰属するものとする。
+  ライセンスは原則 MIT License のため、自由に使って良い。
+  但し /frame/icon.png /frame/icon_mirror.png は CC BY-SA 2.0 とし、
+  著作権はimoyokanに帰属するものとする。
 
 ➤ 使い方
 サイトのルートに /frame 以下をコピー
diff --git a/index.html b/index.html
deleted file mode 100644
index efc8faa..0000000
--- a/index.html
+++ /dev/null
@@ -1 +0,0 @@
-<a href="/develop.html">goto</a>
\ No newline at end of file