diff -u b/asciidoc.install b/asciidoc.install
--- b/asciidoc.install
+++ b/asciidoc.install
@@ -14,22 +14,25 @@
     'asciidoctor',
   ];
 
-  $is_command_avaiable = FALSE;
+  $is_command_available = FALSE;
   foreach ($commands as $command) {
     exec(sprintf('%s --version', $command), $output, $ret);
     if ($ret == 0) {
-      $is_command_avaiable = TRUE;
+      $is_command_available = TRUE;
       break;
     }
   }
 
-  if ($is_command_avaiable) {
-    $severity = NULL;
-    $version = substr(array_shift($output), 9);
+  if ($is_command_available) {
+    $severity = REQUIREMENT_OK;
+    $version = $output[0];
   }
   else {
     $severity = REQUIREMENT_ERROR;
-    $version = t('You need to install <a href="@official_site">AsciiDoc</a> in order to use the AsciiDoc filter module.', array('@official_site' => 'http://www.methods.co.nz/asciidoc/index.html'));
+    $version = t('You need to install <a href="@url_asciidoc">AsciiDoc</a> or <a href="@url_asciidoctor">Asciidoctor</a> in order to use the AsciiDoc filter module.', array(
+      '@url_asciidoc' => 'http://www.methods.co.nz/asciidoc/index.html',
+      '@url_asciidoctor' => 'http://asciidoctor.org',
+    ));
   }
 
   return array(