diff --git a/contrib/updatecheck/index.php b/contrib/updatecheck/index.php
index 7fa4dc7a..9a0d92c3 100644
--- a/contrib/updatecheck/index.php
+++ b/contrib/updatecheck/index.php
@@ -9,12 +9,35 @@ if (substr($agent, 0, 5)==='ebusd') {
   exit;
 }
 readVersions();
+$ref = @file_get_contents('ebusd-configuration/.git/refs/heads/master');
 ?>
 <html>
 <head>
-  <title>ebusd update check service</title>
+  <title>ebusd update check webservice</title>
 </head>
 <body>
-  <p>latest ebusd version: <?=$versions['ebusd'][0]?></p>
   <p>last update: <?=date('c', @filemtime('versions.txt'))?></p>
+<?php
+  if ($ref) {
+    echo "  <p>git revision: <a href=\"https://github.com/john30/ebusd-configuration/tree/$ref\">".substr($ref, 0, 7).'</a></p>';
+  }
+?>
+  <p>latest ebusd version: <?=$versions['ebusd'][0]?></p>
+  <p>config files:
+<?php
+  $func = function($v, $k) {
+    if ($k==='ebusd') {
+      return;
+    }
+    global $ref;
+    $str = "$k: ".date('d.m.Y H:i:s', $v[2]);
+    if ($ref) {
+      echo "  <br><a href=\"https://github.com/john30/ebusd-configuration/blob/$ref/ebusd-2.1.x/de/$k\">$str</a>\n";
+    } else {
+      echo "  <br>$str\n";
+    }
+  };
+  array_walk($versions, $func);
+?>
+  </p>
 </body>
