diff --git a/.gitignore b/.gitignore
index d7c7bbf2..6725ff61 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,6 +36,7 @@ d_pic/uploaded_image
 d_setting/*.php
 */d_setting/*.php
 */d_setting/templates/*.php
+!*.orig.php
 
 */data/file_cache
 
diff --git a/hwe/d_setting/VersionGit.dynamic.orig.php b/hwe/d_setting/VersionGit.dynamic.orig.php
new file mode 100644
index 00000000..02186907
--- /dev/null
+++ b/hwe/d_setting/VersionGit.dynamic.orig.php
@@ -0,0 +1,5 @@
+<?php
+namespace sammo;
+
+class VersionGit extends VersionGitDynamic {
+}
\ No newline at end of file
diff --git a/hwe/d_setting/VersionGit.orig.php b/hwe/d_setting/VersionGit.orig.php
index bedbba01..73b7dab9 100644
--- a/hwe/d_setting/VersionGit.orig.php
+++ b/hwe/d_setting/VersionGit.orig.php
@@ -3,7 +3,8 @@ namespace sammo;
 
 class VersionGit{
     public static $version = '_tK_verionGit_';
+    public static $hash = '_tK_hash_';
 
     private function __construct(){}
 }
-//{"version":"_tK_verionGit_"}
+//{"version":"_tK_verionGit_","hash":"_tK_hash_"}
diff --git a/hwe/sammo/VersionGitDynamic.php b/hwe/sammo/VersionGitDynamic.php
new file mode 100644
index 00000000..c57d975c
--- /dev/null
+++ b/hwe/sammo/VersionGitDynamic.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace sammo;
+
+class VersionGitDynamic
+{
+    public static $version = '_tK_verionGit_';
+
+    static function getVersion()
+    {
+        $command = 'git describe --long --tags';
+        exec($command, $output);
+        if (is_array($output)) {
+            $output = join('', $output);
+        }
+        return trim($output);
+    }
+
+    static function getHash()
+    {
+        $command = 'git rev-parse HEAD';
+        exec($command, $output);
+        if (is_array($output)) {
+            $output = join('', $output);
+        }
+        return trim($output);
+    }
+
+    static function __get($name){
+        if($name === 'version'){
+            return static::getVersion();
+        }
+        if($name === 'hash'){
+            return static::getHash();
+        }
+        trigger_error("Undefined property $name");
+    }
+
+    private function __construct()
+    {
+    }
+}
+//{"version":"_tK_verionGit_"}
diff --git a/j_updateServer.php b/j_updateServer.php
index 612bad13..c6acaf2d 100644
--- a/j_updateServer.php
+++ b/j_updateServer.php
@@ -18,6 +18,16 @@ function getVersion($target = null)
     return trim($output);
 }
 
+function getHash($target = 'HEAD')
+{
+    $command = sprintf('git rev-parse %s', escapeshellarg($target));
+    exec($command, $output);
+    if (is_array($output)) {
+        $output = join('', $output);
+    }
+    return trim($output);
+}
+
 $session = Session::requireLogin(null)->setReadOnly();
 
 $request = $_POST + $_GET;
@@ -142,15 +152,25 @@ if ($server == $baseServerName) {
         ]);
     }
 
-    $version = getVersion();
-    $result = Util::generateFileUsingSimpleTemplate(
-        __DIR__ . '/' . $server . '/d_setting/VersionGit.orig.php',
-        __DIR__ . '/' . $server . '/d_setting/VersionGit.php',
-        [
-            'verionGit' => $version
-        ],
-        true
-    );
+
+    if (
+        hash_file("sha256", __DIR__ . '/' . $server . '/d_setting/VersionGit.dynamic.orig.php') ==
+        hash_file("sha256", __DIR__ . '/' . $server . '/d_setting/VersionGit.php')) {
+            $result = true;
+    }
+    else{
+        $version = getVersion();
+        $hash = getHash();
+        $result = Util::generateFileUsingSimpleTemplate(
+            __DIR__ . '/' . $server . '/d_setting/VersionGit.orig.php',
+            __DIR__ . '/' . $server . '/d_setting/VersionGit.php',
+            [
+                'verionGit' => $version,
+                'hash' => $hash
+            ],
+            true
+        );
+    }
 
     if (ServConfig::$imageRequestKey) {
         try {
@@ -218,11 +238,13 @@ $zip->close();
 @unlink($tmpFile);
 
 $version = getVersion($target);
+$gitHash = getHash($target);
 $result = Util::generateFileUsingSimpleTemplate(
     __DIR__ . '/' . $server . '/d_setting/VersionGit.orig.php',
     __DIR__ . '/' . $server . '/d_setting/VersionGit.php',
     [
-        'verionGit' => $version
+        'verionGit' => $version,
+        'hash' => $gitHash
     ],
     true
 );