diff --git a/.travis.yml b/.travis.yml
index 2bd76a0..42ae403 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,8 @@
 language: php
 
 php:
- - 5.5
- - 5.6
- - 7
- - hhvm
+ - 7.2
+ - 7.3
 
 before_script:
 - composer self-update
diff --git a/src/ParserDom.php b/src/ParserDom.php
index f40b7ae..ac82e63 100644
--- a/src/ParserDom.php
+++ b/src/ParserDom.php
@@ -203,7 +203,7 @@ private function match($exp, $pattern, $value) {
 	 * @return array
 	 */
 	private function parse_selector($selector_string) {
-		$pattern = '/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-:]+)(?:([!*^$]?=)["\']?(.*?)["\']?)?\])?([\/, ]+)/is';
+		$pattern = '/([\w\-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w\-:]+)(?:([!*^$]?=)["\']?(.*?)["\']?)?\])?([\/, ]+)/is';
 		preg_match_all($pattern, trim($selector_string) . ' ', $matches, PREG_SET_ORDER);
 		$selectors = [];
 		$result = [];
</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://github.com/Bxcase/html-parser/compare/master...bupt1987:html-parser:master.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://github.com/Bxcase/html-parser/compare/master...bupt1987:html-parser:master.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>