diff --git a/README.md b/README.md
index bd180ad..16cf7ed 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,8 @@ Suggested Emojis
 | :lock: | `:lock:` | when dealing with **security** |
 | :arrow_up: | `:arrow_up:` | when upgrading **dependencies** |
 | :arrow_down: | `:arrow_down:` | when downgrading **dependencies** |
+| :fast_forward: | `:fast_forward:` | when **forward-porting features** from an older version/branch |
+| :rewind: | `:rewind:` | when **backporting features** from a newer version/branch |
 | :shirt: | `:shirt:` | when removing **linter**/strict/deprecation warnings |
 | :lipstick: | `:lipstick:` | when improving **UI**/Cosmetic |
 | :wheelchair: | `:wheelchair:` | when improving **accessibility** |
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/slashsbin/styleguide-git-commit-message/pull/4.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/slashsbin/styleguide-git-commit-message/pull/4.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>