diff --git a/renderer.php b/renderer.php
index 346c326..ba4da41 100644
--- a/renderer.php
+++ b/renderer.php
@@ -135,7 +135,7 @@ public function matrix_table(question_attempt $qa, question_display_options $opt
         $table .= html_writer::start_tag('div', ['class' => 'answer']);
 
         // Create table and caption.
-        $table .= html_writer::start_tag('table', ['class' => 'generaltable w-75']);
+        $table .= html_writer::start_tag('table', ['class' => 'generaltable']);
         $table .= html_writer::tag('caption', $caption, ['class' => 'sr-only']);
 
         // Creating the matrix column headers.