diff --git a/includes/class-gistpress.php b/includes/class-gistpress.php
index c92acba..1b4140a 100644
--- a/includes/class-gistpress.php
+++ b/includes/class-gistpress.php
@@ -463,6 +463,8 @@ public function process_gist_html( $html, array $args ) {
 		$html = '<?xml encoding="utf-8" ?>' . $html;
 
 		$dom = new DOMDocument();
+		// Suppress warnings for invalid tags.
+		libxml_use_internal_errors(true);
 		$dom->loadHTML( $html, LIBXML_HTML_NODEFDTD | LIBXML_HTML_NOIMPLIED );
 
 		$lines = $dom->getElementsByTagName( 'tr' );