diff --git a/backend.php b/backend.php
index ef1184068..98c8eace6 100644
--- a/backend.php
+++ b/backend.php
@@ -51,7 +51,7 @@
 		UserHelper::load_user_plugins($_SESSION["uid"]);
 	}
 
-	if (Db_Updater::is_update_required()) {
+	if (Config::is_migration_needed()) {
 		print Errors::to_json(Errors::E_SCHEMA_MISMATCH);
 		return;
 	}
diff --git a/classes/config.php b/classes/config.php
index 30b65305a..d0c59fbbd 100644
--- a/classes/config.php
+++ b/classes/config.php
@@ -6,6 +6,8 @@ class Config {
 	const T_STRING = 2;
 	const T_INT = 3;
 
+	const SCHEMA_VERSION = 142;
+
 	// override defaults, defined below in _DEFAULTS[], via environment: DB_TYPE becomes TTRSS_DB_TYPE, etc
 
 	const DB_TYPE = "DB_TYPE";
@@ -228,7 +230,7 @@ class Config {
 	private function _get_migrations() : Db_Migrations {
 		if (empty($this->migrations)) {
 			$this->migrations = new Db_Migrations();
-			$this->migrations->initialize(dirname(__DIR__) . "/sql", "ttrss_version", true);
+			$this->migrations->initialize(dirname(__DIR__) . "/sql", "ttrss_version", true, self::SCHEMA_VERSION);
 		}
 
 		return $this->migrations;
@@ -336,7 +338,7 @@ class Config {
 
 		$pdo = Db::pdo();
 
-		$errors = array();
+		$errors = [];
 
 		if (strpos(self::get(Config::PLUGINS), "auth_") === false) {
 			array_push($errors, "Please enable at least one authentication module via PLUGINS");
@@ -373,6 +375,11 @@ class Config {
 		}
 
 		if (php_sapi_name() != "cli") {
+
+			if (self::get_schema_version() < 0) {
+				array_push($errors, "Base database schema is missing. Either load it manually or perform a migration (<code>update.php --update-schema</code>)");
+			}
+
 			$ref_self_url_path = self::make_self_url();
 
 			if ($ref_self_url_path) {
diff --git a/classes/db/migrations.php b/classes/db/migrations.php
index e77904f60..e5133ddf6 100644
--- a/classes/db/migrations.php
+++ b/classes/db/migrations.php
@@ -89,7 +89,7 @@ class Db_Migrations {
 				try {
 					$this->pdo->query($line);
 				} catch (PDOException $e) {
-					Debug::log("Failed on line: $line");
+					Debug::log("Failed on line: $line", Debug::LOG_VERBOSE);
 					throw $e;
 				}
 			}
diff --git a/classes/db/updater.php b/classes/db/updater.php
deleted file mode 100644
index 9d27c94d9..000000000
--- a/classes/db/updater.php
+++ /dev/null
@@ -1,82 +0,0 @@
-<?php
-class Db_Updater {
-	const SCHEMA_VERSION = 142;
-
-	private $pdo;
-	private $db_type;
-
-	function __construct($pdo, $db_type) {
-		$this->pdo = $pdo;
-		$this->db_type = $db_type;
-	}
-
-	/** always returns actual (=uncached) value */
-	private static function get_schema_version() {
-		return Config::get_schema_version(true);
-	}
-
-	static function is_update_required() {
-		return self::get_schema_version() < self::SCHEMA_VERSION;
-	}
-
-	function get_schema_lines($version) {
-		$filename = "schema/versions/".$this->db_type."/$version.sql";
-
-		if (file_exists($filename)) {
-			return explode(";", (string)preg_replace("/[\r\n]/", "", (string)file_get_contents($filename)));
-		} else {
-			user_error("DB Updater: schema file for version $version is not found.");
-			return false;
-		}
-	}
-
-	function update_to($version, $html_output = true) {
-		if ($this->get_schema_version() == $version - 1) {
-
-			$lines = $this->get_schema_lines($version);
-
-			if (is_array($lines)) {
-
-				$this->pdo->beginTransaction();
-
-				foreach ($lines as $line) {
-					if (strpos($line, "--") !== 0 && $line) {
-
-						if ($html_output)
-							print "<pre>$line</pre>";
-						else
-							Debug::log("> $line");
-
-						try {
-							$this->pdo->query($line); // PDO returns errors as exceptions now
-						} catch (PDOException $e) {
-							if ($html_output) {
-								print "<div class='text-error'>Error: " . $e->getMessage() . "</div>";
-							} else {
-								Debug::log("Error: " . $e->getMessage());
-							}
-
-							$this->pdo->rollBack();
-							return false;
-						}
-					}
-				}
-
-				$db_version = self::get_schema_version();
-
-				if ($db_version == $version) {
-					$this->pdo->commit();
-					return true;
-				} else {
-					$this->pdo->rollBack();
-					return false;
-				}
-			} else {
-				return false;
-			}
-		} else {
-			return false;
-		}
-	}
-
-}
diff --git a/classes/handler/public.php b/classes/handler/public.php
index 08df7bbc1..0e82b6469 100755
--- a/classes/handler/public.php
+++ b/classes/handler/public.php
@@ -623,33 +623,57 @@ class Handler_Public extends Handler {
 		<!DOCTYPE html>
 		<html>
 			<head>
-			<title>Database Updater</title>
+			<title>Tiny Tiny RSS: Database Updater</title>
 			<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
-			<?= stylesheet_tag("themes/light.css") ?>
-			<link rel="shortcut icon" type="image/png" href="images/favicon.png">
 			<link rel="icon" type="image/png" sizes="72x72" href="images/favicon-72px.png">
+			<link rel="shortcut icon" type="image/png" href="images/favicon.png">
+			<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 			<?php
-				echo stylesheet_tag("themes/light.css");
-				echo javascript_tag("lib/dojo/dojo.js");
-				echo javascript_tag("lib/dojo/tt-rss-layer.js");
-			?>
+			foreach (["lib/dojo/dojo.js",
+						"lib/dojo/tt-rss-layer.js",
+						"js/common.js",
+						"js/utility.js"] as $jsfile) {
+
+				echo javascript_tag($jsfile);
+
+			} ?>
+
+			<?php if (theme_exists(Config::get(Config::LOCAL_OVERRIDE_STYLESHEET))) {
+				echo stylesheet_tag(get_theme_path(Config::get(Config::LOCAL_OVERRIDE_STYLESHEET)));
+			} ?>
+
 			<style type="text/css">
-				span.ok { color : #009000; font-weight : bold; }
-				span.err { color : #ff0000; font-weight : bold; }
+				@media (prefers-color-scheme: dark) {
+					body {
+						background : #303030;
+					}
+				}
+
+				body.css_loading * {
+					display : none;
+				}
 			</style>
-		</head>
-		<body class="flat ttrss_utility">
 
 			<script type="text/javascript">
-				require(['dojo/parser', "dojo/ready", 'dijit/form/Button','dijit/form/CheckBox', 'dijit/form/Form',
-					'dijit/form/Select','dijit/form/TextBox','dijit/form/ValidationTextBox'],function(parser, ready){
-					ready(function() {
-						parser.parse();
-					});
-				});
+				require({cache:{}});
+			</script>
+		</head>
+		<body class="flat ttrss_utility css_loading">
 
-				function confirmOP() {
-					return confirm("Update the database?");
+			<script type="text/javascript">
+				const UtilityApp = {
+					init: function() {
+						require(['dojo/parser', "dojo/ready", 'dijit/form/Button','dijit/form/CheckBox', 'dijit/form/Form',
+							'dijit/form/Select','dijit/form/TextBox','dijit/form/ValidationTextBox'],function(parser, ready){
+							ready(function() {
+								parser.parse();
+							});
+						});
+					}
+				}
+
+				function confirmDbUpdate() {
+					return confirm(__("Proceed with update?"));
 				}
 			</script>
 
@@ -660,72 +684,66 @@ class Handler_Public extends Handler {
 
 			<?php
 				@$op = clean($_REQUEST["subop"] ?? "");
-				$updater = new Db_Updater(Db::pdo(), Config::get(Config::DB_TYPE));
+
+				$migrations = Config::get_migrations();
 
 				if ($op == "performupdate") {
-					if (Db_Updater::is_update_required()) {
+					if ($migrations->is_migration_needed()) {
+						?>
 
-						print "<h2>" . T_sprintf("Performing updates to version %d", Db_Updater::SCHEMA_VERSION) . "</h2>";
+						<h2><?= T_sprintf("Performing updates to version %d", Config::SCHEMA_VERSION) ?></h2>
 
-						for ($i = Config::get_schema_version(true) + 1; $i <= Db_Updater::SCHEMA_VERSION; $i++) {
-							print "<ul>";
+						<code><pre class="small pre-wrap"><?php
+							Debug::set_enabled(true);
+							Debug::set_loglevel(Debug::LOG_VERBOSE);
+							$result = $migrations->migrate();
+							Debug::set_loglevel(Debug::LOG_NORMAL);
+							Debug::set_enabled(false);
+						?></pre></code>
 
-							print "<li class='text-info'>" . T_sprintf("Updating to version %d", $i) . "</li>";
+						<?php if (!$result) { ?>
+							<?= format_error("One of migrations failed. Either retry the process or perform updates manually.") ?>
 
-							print "<li>";
-							$result = $updater->update_to($i, true);
-							print "</li>";
+							<form method="post">
+								<?= \Controls\hidden_tag('subop', 'performupdate') ?>
+								<?= \Controls\submit_tag(__("Update"), ["onclick" => "return confirmDbUpdate()"]) ?>
+							</form>
+						<?php } else { ?>
+							<?= format_notice("Update successful.") ?>
 
-							if (!$result) {
-								print "</ul>";
+							<a href="index.php"><?= __("Return to Tiny Tiny RSS") ?></a>
+						<?php }
 
-								print_error("One of the updates failed. Either retry the process or perform updates manually.");
+					} else { ?>
 
-								print "<form method='POST'>
-									<input type='hidden' name='subop' value='performupdate'>
-									<button type='submit' dojoType='dijit.form.Button' class='alt-danger' onclick='return confirmOP()'>".__("Try again")."</button>
-									<a href='index.php'>".__("Return to Tiny Tiny RSS")."</a>
-								</form>";
+						<?= format_notice("Database is already up to date.") ?>
 
-								return;
-							} else {
-								print "<li class='text-success'>" . __("Completed.") . "</li>";
-								print "</ul>";
-							}
-						}
+						<a href="index.php"><?= __("Return to Tiny Tiny RSS") ?></a>
 
-						print_notice("Your Tiny Tiny RSS database is now updated to the latest version.");
-
-						print "<a href='index.php'>".__("Return to Tiny Tiny RSS")."</a>";
-
-					} else {
-						print_notice("Tiny Tiny RSS database is up to date.");
-
-						print "<a href='index.php'>".__("Return to Tiny Tiny RSS")."</a>";
+						<?php
 					}
 				} else {
-					if (Db_Updater::is_update_required()) {
+					if ($migrations->is_migration_needed()) {
 
-						print "<h2>".T_sprintf("Tiny Tiny RSS database needs update to the latest version (%d to %d).",
-							Config::get_schema_version(true), Db_Updater::SCHEMA_VERSION)."</h2>";
+						?>
+						<h2><?= T_sprintf("Database schema needs update to the latest version (%d to %d).",
+							Config::get_schema_version(), Config::SCHEMA_VERSION) ?></h2>
 
-						if (Config::get(Config::DB_TYPE) == "mysql") {
-							print_error("<strong>READ THIS:</strong> Due to MySQL limitations, your database is not completely protected while updating. ".
-								"Errors may put it in an inconsistent state requiring manual rollback. <strong>BACKUP YOUR DATABASE BEFORE CONTINUING.</strong>");
-						} else {
-							print_warning("Please backup your database before proceeding.");
-						}
+						<?= format_warning("Please backup your database before proceeding.") ?>
 
-						print "<form method='POST'>
-							<input type='hidden' name='subop' value='performupdate'>
-							<button type='submit' dojoType='dijit.form.Button' class='alt-danger' onclick='return confirmOP()'>".__("Perform updates")."</button>
-						</form>";
+						<form method="post">
+							<?= \Controls\hidden_tag('subop', 'performupdate') ?>
+							<?= \Controls\submit_tag(__("Update"), ["onclick" => "return confirmDbUpdate()"]) ?>
+						</form>
 
-					} else {
+						<?php
+					} else { ?>
 
-						print_notice("Tiny Tiny RSS database is up to date.");
+						<?= format_notice("Database is already up to date.") ?>
 
-						print "<a href='index.php'>".__("Return to Tiny Tiny RSS")."</a>";
+						<a href="index.php"><?= __("Return to Tiny Tiny RSS") ?></a>
+
+						<?php
 					}
 				}
 			?>
diff --git a/classes/opml.php b/classes/opml.php
index 1a223788f..f8e9f6728 100644
--- a/classes/opml.php
+++ b/classes/opml.php
@@ -151,7 +151,7 @@ class OPML extends Handler_Protected {
 		# export tt-rss settings
 
 		if ($include_settings) {
-			$out .= "<outline text=\"tt-rss-prefs\" schema-version=\"".Db_Updater::SCHEMA_VERSION."\">";
+			$out .= "<outline text=\"tt-rss-prefs\" schema-version=\"".Config::SCHEMA_VERSION."\">";
 
 			$sth = $this->pdo->prepare("SELECT pref_name, value FROM ttrss_user_prefs2 WHERE
 			   profile IS NULL AND owner_uid = ? ORDER BY pref_name");
@@ -166,7 +166,7 @@ class OPML extends Handler_Protected {
 
 			$out .= "</outline>";
 
-			$out .= "<outline text=\"tt-rss-labels\" schema-version=\"".Db_Updater::SCHEMA_VERSION."\">";
+			$out .= "<outline text=\"tt-rss-labels\" schema-version=\"".Config::SCHEMA_VERSION."\">";
 
 			$sth = $this->pdo->prepare("SELECT * FROM ttrss_labels2 WHERE
 				owner_uid = ?");
@@ -183,7 +183,7 @@ class OPML extends Handler_Protected {
 
 			$out .= "</outline>";
 
-			$out .= "<outline text=\"tt-rss-filters\" schema-version=\"".Db_Updater::SCHEMA_VERSION."\">";
+			$out .= "<outline text=\"tt-rss-filters\" schema-version=\"".Config::SCHEMA_VERSION."\">";
 
 			$sth = $this->pdo->prepare("SELECT * FROM ttrss_filters2
 				WHERE owner_uid = ? ORDER BY id");
diff --git a/classes/rpc.php b/classes/rpc.php
index 90c2c762a..054b711bc 100755
--- a/classes/rpc.php
+++ b/classes/rpc.php
@@ -181,7 +181,7 @@ class RPC extends Handler_Protected {
 		$client_scheme = parse_url($client_location, PHP_URL_SCHEME);
 		$server_scheme = parse_url(Config::get_self_url(), PHP_URL_SCHEME);
 
-		if (Db_Updater::is_update_required()) {
+		if (Config::is_migration_needed()) {
 			$error = Errors::E_SCHEMA_MISMATCH;
 		} else if ($client_scheme != $server_scheme) {
 			$error = Errors::E_URL_SCHEME_MISMATCH;
diff --git a/classes/rssutils.php b/classes/rssutils.php
index 0d78e0ec7..9480c0b0b 100755
--- a/classes/rssutils.php
+++ b/classes/rssutils.php
@@ -55,7 +55,7 @@ class RSSUtils {
 	static function update_daemon_common($limit = null, $options = []) {
 		if (!$limit) $limit = Config::get(Config::DAEMON_FEED_LIMIT);
 
-		if (Config::get_schema_version() != Db_Updater::SCHEMA_VERSION) {
+		if (Config::get_schema_version() != Config::SCHEMA_VERSION) {
 			die("Schema version is wrong, please upgrade the database.\n");
 		}
 
diff --git a/include/functions.php b/include/functions.php
index 4d11ea31f..5e75439cf 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -2,8 +2,8 @@
 	define('LABEL_BASE_INDEX', -1024);
 	define('PLUGIN_FEED_BASE_INDEX', -128);
 
-	/** constant is @deprecated, use Db_Updater::SCHEMA_VERSION instead */
-	define('SCHEMA_VERSION', Db_Updater::SCHEMA_VERSION);
+	/** constant is @deprecated, use Config::SCHEMA_VERSION instead */
+	define('SCHEMA_VERSION', Config::SCHEMA_VERSION);
 
 	if (version_compare(PHP_VERSION, '8.0.0', '<')) {
 		libxml_disable_entity_loader(true);
diff --git a/include/sessions.php b/include/sessions.php
index 3a1a3b8cd..cda42f52b 100644
--- a/include/sessions.php
+++ b/include/sessions.php
@@ -122,17 +122,19 @@
 		return true;
 	}
 
-	if (!\Config::get(\Config::SINGLE_USER_MODE)) {
-		session_set_save_handler('\Sessions\ttrss_open',
-			'\Sessions\ttrss_close', '\Sessions\ttrss_read',
-			'\Sessions\ttrss_write', '\Sessions\ttrss_destroy',
-			'\Sessions\ttrss_gc');
-		register_shutdown_function('session_write_close');
-	}
+	if (\Config::get_schema_version() >= 0) {
+		if (!\Config::get(\Config::SINGLE_USER_MODE)) {
+			session_set_save_handler('\Sessions\ttrss_open',
+				'\Sessions\ttrss_close', '\Sessions\ttrss_read',
+				'\Sessions\ttrss_write', '\Sessions\ttrss_destroy',
+				'\Sessions\ttrss_gc');
+			register_shutdown_function('session_write_close');
+		}
 
-	if (!defined('NO_SESSION_AUTOSTART')) {
-		if (isset($_COOKIE[session_name()])) {
-			if (session_status() != PHP_SESSION_ACTIVE)
-					session_start();
+		if (!defined('NO_SESSION_AUTOSTART')) {
+			if (isset($_COOKIE[session_name()])) {
+				if (session_status() != PHP_SESSION_ACTIVE)
+						session_start();
+			}
 		}
 	}
diff --git a/schema/ttrss_schema_mysql.sql b/schema/ttrss_schema_mysql.sql
new file mode 100644
index 000000000..e69de29bb
diff --git a/schema/ttrss_schema_pgsql.sql b/schema/ttrss_schema_pgsql.sql
new file mode 100644
index 000000000..e69de29bb
diff --git a/update.php b/update.php
index d19c5f823..ad5704a7d 100755
--- a/update.php
+++ b/update.php
@@ -378,7 +378,7 @@
 				if (read_stdin() != 'yes')
 					exit;
 			} else {
-				Debug::log("Proceeding to update without confirmation...");
+				Debug::log("Proceeding to update without confirmation.");
 			}
 
 			if (!isset($options["log-level"])) {
@@ -386,57 +386,11 @@
 			}
 
 			$migrations = Config::get_migrations();
-
-			Debug::log("Migrating schema to version " . $migrations->get_max_version());
-
 			$migrations->migrate();
 
 		} else {
 			Debug::log("Database schema is already at latest version.");
 		}
-
-		/*Debug::log("Checking for updates (" . Config::get(Config::DB_TYPE) . ")...");
-
-		$updater = new Db_Updater(Db::pdo(), Config::get(Config::DB_TYPE));
-
-		if (Db_Updater::is_update_required()) {
-			Debug::log("Schema update required, version " . Config::get_schema_version(true) . " to " . Db_Updater::SCHEMA_VERSION);
-
-			if (Config::get(Config::DB_TYPE) == "mysql")
-				Debug::Log("READ THIS: Due to MySQL limitations, your database is not completely protected while updating.\n".
-					"Errors may put it in an inconsistent state requiring manual rollback.\nBACKUP YOUR DATABASE BEFORE CONTINUING.");
-			else
-				Debug::log("WARNING: please backup your database before continuing.");
-
-			if ($options["update-schema"] != "force-yes") {
-				Debug::log("Type 'yes' to continue.");
-
-				if (read_stdin() != 'yes')
-					exit;
-			} else {
-				Debug::log("Proceeding to update without confirmation...");
-			}
-
-			Debug::log("Performing updates to version " . Db_Updater::SCHEMA_VERSION . "...");
-
-			for ($i = Config::get_schema_version(true) + 1; $i <= Db_Updater::SCHEMA_VERSION; $i++) {
-				Debug::log("* Updating to version $i...");
-
-				$result = $updater->update_to($i, false);
-
-				if ($result) {
-					Debug::log("* Completed.");
-				} else {
-					Debug::log("One of the updates failed. Either retry the process or perform updates manually.");
-					return;
-				}
-			}
-
-			Debug::log("All done.");
-		} else {
-			Debug::log("Database schema is already at latest version.");
-		} */
-
 	}
 
 	if (isset($options["gen-search-idx"])) {
diff --git a/update_daemon2.php b/update_daemon2.php
index 17bca48ee..8931813ff 100755
--- a/update_daemon2.php
+++ b/update_daemon2.php
@@ -189,7 +189,7 @@
 			"Maybe another daemon is already running.\n");
 	}
 
-	if (Db_Updater::is_update_required()) {
+	if (Config::is_migration_needed()) {
 		die("Schema version is wrong, please upgrade the database.\n");
 	}