diff --git a/.gitignore b/.gitignore
index 33136ce..8508087 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,7 +7,7 @@ src/test.php
 .DS_Store
 ._.DS_Store
 .sass-cache/
-config-static.php
+config-runtime.php
 /config.yaml
 /.idea
 /htdocs/dist-css
diff --git a/Makefile b/Makefile
index 50e2ef7..376ae29 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ all:
 deploy:
 	./deploy/deploy.sh
 
-static: build-js build-css static-config
+static: build-js build-css runtime-config
 
 build-js:
 	./deploy/build_js.sh -i ./htdocs/js -o ./htdocs/dist-js
@@ -18,5 +18,5 @@ build-js:
 build-css:
 	./deploy/build_css.sh -i ./htdocs/scss -o ./htdocs/dist-css
 
-static-config:
-	./deploy/gen_static_config.php -i ./htdocs > ./config-static.php
+runtime-config:
+	./deploy/gen_runtime_config.php -i ./htdocs > ./config-runtime.php
diff --git a/deploy/deploy.sh b/deploy/deploy.sh
index a50d272..a0dc966 100755
--- a/deploy/deploy.sh
+++ b/deploy/deploy.sh
@@ -41,7 +41,9 @@ cp "$DEV_DIR/config.yaml" .
 
 "$DIR"/build_js.sh -i "$DEV_DIR/htdocs/js" -o "$STAGING_DIR/htdocs/dist-js" || die "build_js failed"
 "$DIR"/build_css.sh -i "$DEV_DIR/htdocs/scss" -o "$STAGING_DIR/htdocs/dist-css" || die "build_css failed"
-$PHP "$DIR"/gen_static_config.php -i "$STAGING_DIR/htdocs" > "$STAGING_DIR/config-static.php" || die "gen_static_config failed"
+$PHP "$DIR"/gen_runtime_config.php \
+	--htdocs-dir "$STAGING_DIR/htdocs" \
+	--commit-hash "$(git rev-parse --short=8 HEAD)" > "$STAGING_DIR/config-runtime.php" || die "gen_runtime_config failed"
 
 cd "$DIR"
 
diff --git a/deploy/gen_static_config.php b/deploy/gen_runtime_config.php
similarity index 54%
rename from deploy/gen_static_config.php
rename to deploy/gen_runtime_config.php
index 084195d..f2ea0e3 100755
--- a/deploy/gen_static_config.php
+++ b/deploy/gen_runtime_config.php
@@ -1,67 +1,57 @@
 #!/usr/bin/env php
 <?php
 
-use app\CliUtil;
-
 require __DIR__.'/../src/init.php';
 
-if ($argc <= 1) {
-    usage();
-    exit(1);
-}
+$htdocs_dir = null;
+$commit_hash = null;
+for ($i = 1; $i < $argc; $i++) {
+    switch ($argv[$i]) {
+        case '--htdocs-dir':
+            $htdocs_dir = $argv[++$i] ?? usage('missing value for --htdocs-dir');
+            break;
 
-$input_dir = null;
-
-array_shift($argv);
-while (count($argv) > 0) {
-    switch ($argv[0]) {
-        case '-i':
-            array_shift($argv);
-            $input_dir = array_shift($argv);
+        case '--commit-hash':
+            $commit_hash = $argv[++$i] ?? usage('missing value for --commit-hash');
             break;
 
         default:
-            CliUtil::die('unsupported argument: '.$argv[0]);
+            usage("unknown option {$argv[$i]}");
     }
 }
 
-if (is_null($input_dir))
-    CliUtil::die("input directory has not been specified");
+if (is_null($htdocs_dir) || is_null($commit_hash))
+    usage();
 
-$hashes = [];
+$hashes = [
+    'commit_hash' => $commit_hash,
+    'assets' => []
+];
 foreach (['css', 'js'] as $type) {
-    $entries = glob_recursive($input_dir.'/dist-'.$type.'/*.'.$type);
+    $entries = glob_recursive($htdocs_dir.'/dist-'.$type.'/*.'.$type);
     if (empty($entries)) {
-        CliUtil::error("warning: no files found in $input_dir/dist-$type");
+        fwrite(STDERR, "warning: no files found in $htdocs_dir/dist-$type\n");
         continue;
     }
 
     foreach ($entries as $file) {
-        $hashes[$type.'/'.basename($file)] = [
-            'version' => get_hash($file),
+        $hashes['assets'][$type.'/'.basename($file)] = [
             'integrity' => []
         ];
         foreach (\engine\skin\FeaturedSkin::RESOURCE_INTEGRITY_HASHES as $hash_type)
-            $hashes[$type.'/'.basename($file)]['integrity'][$hash_type] = base64_encode(hash_file($hash_type, $file, true));
+            $hashes['assets'][$type.'/'.basename($file)]['integrity'][$hash_type] = base64_encode(hash_file($hash_type, $file, true));
     }
 }
 
 echo "<?php\n\n";
 echo "return ".var_export($hashes, true).";\n";
 
-function usage(): void {
-    global $argv;
-    echo <<<EOF
-usage: {$argv[0]} [OPTIONS]
-
-Options:
-    -i  input htdocs directory
-
-EOF;
-}
-
-function get_hash(string $path): string {
-    return substr(sha1(file_get_contents($path)), 0, 8);
+function usage(string $msg = ''): never  {
+    if ($msg !== '')
+        fwrite(STDERR, "error: {$msg}\n");
+    $script = $GLOBALS['argv'][0];
+    fwrite(STDERR, "usage: {$script} --htdocs_dir DIR --commit-hash HASH\n");
+    exit(1);
 }
 
 function glob_escape(string $pattern): string {
diff --git a/htdocs/js/common/30-static-manager.js b/htdocs/js/common/30-static-manager.js
index 87bb5fc..41ea8a1 100644
--- a/htdocs/js/common/30-static-manager.js
+++ b/htdocs/js/common/30-static-manager.js
@@ -10,10 +10,17 @@ var StaticManager = {
     versions: {},
 
     /**
+     * @type {string}
+     */
+    commitHash: '',
+
+    /**
+     * @param {string} commitHash
      * @param {string[]} loadedStyles
      * @param {object} versions
      */
-    init: function(loadedStyles, versions) {
+    init: function(commitHash, loadedStyles, versions) {
+        this.commitHash = commitHash;
         this.loadedStyles = loadedStyles;
         this.versions = versions;
     },
@@ -28,7 +35,7 @@ var StaticManager = {
         if (!window.appConfig.devMode) {
             if (theme === 'dark')
                 name += '_dark';
-            url = '/dist-css/'+name+'.css?v='+this.versions.css[name].version;
+            url = '/dist-css/'+name+'.css?v='+this.commitHash;
             id = 'style_'+name;
         } else {
             url = '/sass.php?name='+name+'&theme='+theme+'&v='+timestamp();
diff --git a/src/engine/skin/FeaturedSkin.php b/src/engine/skin/FeaturedSkin.php
index 5044331..57e19fa 100644
--- a/src/engine/skin/FeaturedSkin.php
+++ b/src/engine/skin/FeaturedSkin.php
@@ -205,13 +205,13 @@ HTML;
             $versions = '{}';
         else {
             $versions = [];
-            foreach ($config['static'] as $name => $v) {
+            foreach ($config['assets'] as $name => $v) {
                 list($type, $bname) = $this->getStaticNameParts($name);
                 $versions[$type][$bname] = $v;
             }
             $versions = jsonEncode($versions);
         }
-        $html .= 'StaticManager.init('.jsonEncode($this->styleNames).', '.$versions.');';
+        $html .= 'StaticManager.init(\''.$config['commit_hash'].'\', '.jsonEncode($this->styleNames).', '.$versions.');';
         $html .= 'ThemeSwitcher.init();';
 
         if (!empty($this->exportedStrings)) {
@@ -230,16 +230,18 @@ HTML;
     }
 
     protected function jsLink(string $name): string {
+        global $config;
         list (, $bname) = $this->getStaticNameParts($name);
         if (isDev()) {
             $href = '/js.php?name='.urlencode($bname).'&amp;v='.time();
         } else {
-            $href = '/dist-js/'.$bname.'.js?v='.$this->getStaticVersion($name);
+            $href = '/dist-js/'.$bname.'.js?v='.$config['commit_hash'];
         }
         return '<script src="'.$href.'" type="text/javascript"'.$this->getStaticIntegrityAttribute($name).'></script>';
     }
 
     protected function cssLink(string $name, string $theme, &$bname = null): string {
+        global $config;
         list(, $bname) = $this->getStaticNameParts($name);
 
         $config_name = 'css/'.$bname.($theme == 'dark' ? '_dark' : '').'.css';
@@ -247,8 +249,7 @@ HTML;
         if (isDev()) {
             $href = '/sass.php?name='.urlencode($bname).'&amp;theme='.$theme.'&amp;v='.time();
         } else {
-            $version = $this->getStaticVersion($config_name);
-            $href = '/dist-css/'.$bname.($theme == 'dark' ? '_dark' : '').'.css?v='.$version;
+            $href = '/dist-css/'.$bname.($theme == 'dark' ? '_dark' : '').'.css?v='.$config['commit_hash'];
         }
 
         $id = 'style_'.$bname;
@@ -259,7 +260,8 @@ HTML;
     }
 
     protected function cssPrefetchLink(string $name): string {
-        $url = '/dist-css/'.$name.'.css?v='.$this->getStaticVersion('css/'.$name.'.css');
+        global $config;
+        $url = '/dist-css/'.$name.'.css?v='.$config['commit_hash'];
         $integrity = $this->getStaticIntegrityAttribute('css/'.$name.'.css');
         return '<link rel="prefetch" href="'.$url.'"'.$integrity.' />';
     }
@@ -276,21 +278,10 @@ HTML;
         return [$dname, $bname, $ext];
     }
 
-    protected function getStaticVersion(string $name): string {
-        global $config;
-        if (isDev())
-            return time();
-        if (str_starts_with($name, '/')) {
-            logWarning(__FUNCTION__.': '.$name.' starts with /');
-            $name = substr($name, 1);
-        }
-        return $config['static'][$name]['version'] ?? 'notfound';
-    }
-
     protected function getStaticIntegrityAttribute(string $name): string {
         if (isDev())
             return '';
         global $config;
-        return ' integrity="'.implode(' ', array_map(fn($hash_type) => $hash_type.'-'.$config['static'][$name]['integrity'][$hash_type], self::RESOURCE_INTEGRITY_HASHES)).'"';
+        return ' integrity="'.implode(' ', array_map(fn($hash_type) => $hash_type.'-'.$config['assets'][$name]['integrity'][$hash_type], self::RESOURCE_INTEGRITY_HASHES)).'"';
     }
 }
\ No newline at end of file
diff --git a/src/init.php b/src/init.php
index 88c63c3..222fe45 100644
--- a/src/init.php
+++ b/src/init.php
@@ -57,10 +57,10 @@ $globalContext->setLogger($logger);
 unset($logger);
 
 if (!isDev()) {
-    if (file_exists(APP_ROOT.'/config-static.php'))
-        $config['static'] = require_once 'config-static.php';
+    if (file_exists(APP_ROOT.'/config-runtime.php'))
+        $config += require_once 'config-runtime.php';
     else
-        die('config-static.php not found');
+        die('config-runtime.php not found');
 
     // turn off errors output on production domains
     error_reporting(0);