diff --git a/lib/blocks.js b/lib/blocks.js
index 0d2a8ec1..4c948d08 100644
--- a/lib/blocks.js
+++ b/lib/blocks.js
@@ -23,7 +23,7 @@ var reHtmlBlockOpen = [
    /^<[?]/,
    /^<![A-Z]/,
    /^<!\[CDATA\[/,
-   /^<[/]?(?:address|article|aside|base|basefont|blockquote|body|caption|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption|figure|footer|form|frame|frameset|h[123456]|head|header|hr|html|iframe|legend|li|link|main|menu|menuitem|nav|noframes|ol|optgroup|option|p|param|section|source|title|summary|table|tbody|td|tfoot|th|thead|title|tr|track|ul)(?:\s|[/]?[>]|$)/i,
+   /^<[/]?(?:address|article|aside|base|basefont|blockquote|body|caption|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption|figure|footer|form|frame|frameset|h[123456]|head|header|hr|html|iframe|legend|li|link|main|menu|menuitem|nav|noframes|ol|optgroup|option|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr|track|ul)(?:\s|[/]?[>]|$)/i,
     new RegExp('^(?:' + OPENTAG + '|' + CLOSETAG + ')\\s*$', 'i')
 ];