diff --git a/composer.json b/composer.json
index b3cb2177..b78a50e5 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,6 @@
 "require": {
 "php": ">7.2.0",
 "toolkit/cli-utils": "~1.0",
- "toolkit/pflag": "~1.0",
 "toolkit/stdlib": "~1.0",
 "toolkit/sys-utils": "~1.0"
 },
diff --git a/src/Component/Interact/Choose.php b/src/Component/Interact/Choose.php
index 978153e1..4fb6edf9 100644
--- a/src/Component/Interact/Choose.php
+++ b/src/Component/Interact/Choose.php
@@ -55,7 +55,7 @@ public static function one(string $description, $options, $default = null, bool
 $text .= "\n <info>$key</info>) $value";
 }
 
- $defaultText = $default ? "[default:<info>$default</info>]" : '';
+ $defaultText = $default !== null ? "[default:<info>$default</info>]" : '';
 Console::write($text);
 
 beginChoice:
</div><div class="naked_ctrl">
<form action="/index.cgi/larger-text" 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://github.com/inhere/php-console/compare/master...3.x.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://github.com/inhere/php-console/compare/master...3.x.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">配色反転</option>
<option value="larger-text" selected="selected">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>